Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Noun
S: (n) component, constituent, element, factor, ingredient (an abstract part of something) "jealousy was a component of his character"; "two constituents of a musical composition are melody and harmony"; "the grammatical elements of a sentence"; "a key factor in her success"; "humor: an effective ingredient of a speech"
S: (n) component, constituent, element (an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system) "spare components for cars"; "a component or constituent element of a system"
S: (n) chemical element, element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)
S: (n) argon, Ar, atomic number 18 (a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere)
S: (n) helium, He, atomic number 2 (a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas))
S: (n) neon, Ne, atomic number 10 (a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts)
S: (n) radon, Rn, atomic number 86 (a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health)
S: (n) xenon, Xe, atomic number 54 (a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts)
S: (n) metallic element, metal (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)
S: (n) heavy metal (a metal of relatively high density (specific gravity greater than about 5) or of high relative atomic weight (especially one that is poisonous like mercury or lead))
S: (n) base metal (a metal that is common and not considered precious) "lead, iron, copper, tin, and zinc are base metals"
S: (n) noble metal (any metal that is resistant to corrosion or oxidation)
S: (n) gold, Au, atomic number 79 (a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia)
S: (n) platinum, Pt, atomic number 78 (a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits)
S: (n) silver, Ag, atomic number 47 (a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography)
S: (n) coin silver (a silver of the degree of purity established for making legal silver coins)
S: (n) bismuth, Bi, atomic number 83 (a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals)
S: (n) cadmium, Cd, atomic number 48 (a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores)
S: (n) calcium, Ca, atomic number 20 (a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals)
S: (n) cerium, Ce, atomic number 58 (a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group)
S: (n) cesium, caesium, Cs, atomic number 55 (a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal)
S: (n) cesium 137 (a radioactive isotope of cesium used in radiation therapy)
S: (n) chrome (another word for chromium when it is used in dyes or pigments)
S: (n) cobalt, Co, atomic number 27 (a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition)
S: (n) cobalt 60 (a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapy)
S: (n) copper, Cu, atomic number 29 (a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor)
S: (n) gallium, Ga, atomic number 31 (a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores)
S: (n) hafnium, Hf, atomic number 72 (a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons)
S: (n) holmium, Ho, atomic number 67 (a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds)
S: (n) iridium, Ir, atomic number 77 (a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium)
S: (n) iron, Fe, atomic number 26 (a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood)
S: (n) alpha iron (a magnetic allotrope of iron; stable below 906 degrees centigrade)
S: (n) beta iron (an allotrope of iron that is the same as alpha iron except that it is nonmagnetic; stable between 768 and 906 degrees centigrade)
S: (n) gamma iron (a nonmagnetic allotrope of iron that is the basis of austenite; stable between 906 and 1403 degrees centigrade)
S: (n) delta iron (an allotrope of iron that is stable between 1403 degrees centigrade and the melting point (= 1532 degrees))
S: (n) cast iron (an alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting)
S: (n) alloy iron, alloy cast iron (cast iron containing alloying elements (usually nickel or chromium or copper or molybdenum) to increase the strength or facilitate heat treatment)
S: (n) spiegeleisen, spiegel, spiegel iron (pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel)
S: (n) lanthanum, La, atomic number 57 (a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth)
S: (n) lead, Pb, atomic number 82 (a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey) "the children were playing with lead soldiers"
S: (n) hard lead (unrefined lead that is hard because of the impurities it contains)
S: (n) lithium, Li, atomic number 3 (a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals)
S: (n) magnesium, Mg, atomic number 12 (a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine))
S: (n) manganese, Mn, atomic number 25 (a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals)
S: (n) molybdenum, Mo, atomic number 42 (a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel)
S: (n) neodymium, Nd, atomic number 60 (a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium)
S: (n) neptunium, Np, atomic number 93 (a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium)
S: (n) nickel, Ni, atomic number 28 (a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite)
S: (n) niobium, Nb, atomic number 41 (a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium)
S: (n) osmium, Os, atomic number 76 (a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known)
S: (n) palladium, Pd, atomic number 46 (a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry)
S: (n) polonium, Po, atomic number 84 (a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor)
S: (n) potassium, K, atomic number 19 (a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite)
S: (n) praseodymium, Pr, atomic number 59 (a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process)
S: (n) promethium, Pm, atomic number 61 (a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium)
S: (n) radium, Ra, atomic number 88 (an intensely radioactive metallic element that occurs in minute amounts in uranium ores)
S: (n) rhenium, Re, atomic number 75 (a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum)
S: (n) rhodium, Rh, atomic number 45 (a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum)
S: (n) rubidium, Rb, atomic number 37 (a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite)
S: (n) samarium, Sm, atomic number 62 (a grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite)
S: (n) scandium, Sc, atomic number 21 (a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite)
S: (n) sodium, Na, atomic number 11 (a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt))
S: (n) strontium, Sr, atomic number 38 (a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite)
S: (n) strontium 90 (a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones)
S: (n) tantalum, Ta, atomic number 73 (a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite)
S: (n) technetium, Tc, atomic number 43 (a crystalline metallic element not found in nature; occurs as one of the fission products of uranium)
S: (n) terbium, Tb, atomic number 65 (a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite)
S: (n) thallium, Tl, atomic number 81 (a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores)
S: (n) thorium, Th, atomic number 90 (a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands)
S: (n) thulium, Tm, atomic number 69 (a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime)
S: (n) tin, Sn, atomic number 50 (a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide)
S: (n) titanium, Ti, atomic number 22 (a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite)
S: (n) tungsten, wolfram, W, atomic number 74 (a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite)
S: (n) uranium, U, atomic number 92 (a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons)
S: (n) uranium 235 (a uranium isotope with mass number 235; capable of sustaining chain reactions)
S: (n) uranium 238 (the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239)
S: (n) vanadium, V, atomic number 23 (a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite)
S: (n) ytterbium, Yb, atomic number 70 (a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime)
S: (n) yttrium, Y, atomic number 39 (a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys)
S: (n) zinc, Zn, atomic number 30 (a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende)
S: (n) spelter (impure zinc containing about three percent lead and other impurities (especially in the form of ingots))
S: (n) zirconium, Zr, atomic number 40 (a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon)
S: (n) alkali metal, alkaline metal (any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)) "the hydroxides of the alkali metals are strongly alkaline"
S: (n) alkaline earth, alkaline-earth metal (any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium))
S: (n) nonmetal (a chemical element lacking typical metallic properties)
S: (n) transactinide (any of the artificially produced elements with atomic numbers greater than 103)
S: (n) argon, Ar, atomic number 18 (a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere)
S: (n) arsenic, As, atomic number 33 (a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar)
S: (n) astatine, At, atomic number 85 (a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium)
S: (n) boron, B, atomic number 5 (a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder)
S: (n) bromine, Br, atomic number 35 (a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water)
S: (n) carbon, C, atomic number 6 (an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds)
S: (n) fullerene (a form of carbon having a large molecule consisting of an empty cage of sixty or more carbon atoms)
S: (n) snuff (the charred portion of a candlewick)
S: (n) charcoal, wood coal (a carbonaceous material obtained by heating wood or other organic matter in the absence of air)
S: (n) carbon black, lampblack, soot, smut, crock (a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink)
S: (n) activated carbon, activated charcoal (powdered or granular carbon used for purifying by adsorption; given orally (as a slurry) it is an antidote for some kinds of poisons)
S: (n) lead, pencil lead (mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil)
S: (n) pencil (graphite (or a similar substance) used in such a way as to be a medium of communication) "the words were scribbled in pencil"; "this artist's favorite medium is pencil"
S: (n) chlorine, Cl, atomic number 17 (a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water))
S: (n) fluorine, F, atomic number 9 (a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite)
S: (n) germanium, Ge, atomic number 32 (a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite)
S: (n) helium, He, atomic number 2 (a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas))
S: (n) hydrogen, H, atomic number 1 (a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe)
S: (n) tritium (a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms)
S: (n) iodine, iodin, I, atomic number 53 (a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks))
S: (n) iodine-131 (heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter)
S: (n) iodine-125 (light radioactive isotope of iodine with a half-life of 60 days; used as a tracer in thyroid studies and as a treatment for hyperthyroidism)
S: (n) mendelevium, Md, Mv, atomic number 101 (a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol))
S: (n) neon, Ne, atomic number 10 (a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts)
S: (n) nitrogen, N, atomic number 7 (a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues)
S: (n) nobelium, No, atomic number 102 (a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known)
S: (n) oxygen, O, atomic number 8 (a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust)
S: (n) liquid oxygen, LOX (a bluish translucent magnetic liquid obtained by compressing gaseous oxygen and then cooling it below its boiling point; used as an oxidizer in rocket propellants)
S: (n) phosphorus, P, atomic number 15 (a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms)
S: (n) plutonium, Pu, atomic number 94 (a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239)
S: (n) plutonium 239 (a highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel; produced by irradiating uranium 238 with slow electrons)
S: (n) radon, Rn, atomic number 86 (a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health)
S: (n) selenium, Se, atomic number 34 (a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite))
S: (n) silicon, Si, atomic number 14 (a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors)
S: (n) sulfur, S, sulphur, atomic number 16 (an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions))
S: (n) tellurium, Te, atomic number 52 (a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold)
S: (n) element (the most favorable environment for a plant or animal) "water is the element of fishes"
S: (n) element (one of four substances thought in ancient and medieval cosmology to constitute the physical universe) "the alchemists believed that there were four elements"