S: (n) enzyme (any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions)
S: (n) protein (any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes) "a diet high in protein"
S: (n) subject, content, depicted object (something (a person or object or scene) selected by an artist or photographer for graphic representation) "a moving picture of a train is more dramatic than a still picture of the same subject"
S: (n) body of water, water (the part of the earth's surface covered with water (such as a river or lake or ocean)) "they invaded our territorial waters"; "they were sitting by the water's edge"
S: (n) necessity, essential, requirement, requisite, necessary (anything indispensable) "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained"
S: (n) part, piece (a portion of a natural object) "they analyzed the river into three parts"; "he needed a piece of granite"
S: (n) reservoir, source (anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies) "an infectious agent depends on a reservoir for its survival"
S: (n) unit, building block (a single undivided natural thing occurring in the composition of something else) "units of nucleic acids"
S: (n) variable (something that is likely to vary; something that is subject to variation) "the weather is one variable to be considered"
S: (n) compound, chemical compound ((chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight)
S: (n) material, stuff (the tangible substance that goes into the makeup of a physical object) "coal is a hard black material"; "wheat is the stuff they use to make bread"
S: (n) substance (the real physical matter of which a person or thing consists) "DNA is the substance of our genes"
S: (n) matter (that which has mass and occupies space) "physicists study both the nature of matter and the forces which govern it"
S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
S: (n) part, portion, component part, component, constituent (something determined in relation to something that includes it) "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"; "the animal constituent of plankton"
S: (n) relation (an abstraction belonging to or characteristic of two entities or parts together)
W: (adj) chemical [Related to: chemical] (of or made from or using substances produced by or used in reactions involving atomic or molecular changes) "chemical fertilizer"
S: (n) catalyst, accelerator ((chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected)
S: (n) activator ((biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription)
S: (n) substance (the real physical matter of which a person or thing consists) "DNA is the substance of our genes"
S: (n) ylem ((cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elements)
S: (n) dark matter ((cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force)
S: (n) antimatter (matter consisting of elementary particles that are the antiparticles of those making up normal substances)
S: (n) glop (any gummy shapeless matter; usually unpleasant)
S: (n) fluid (continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas)
S: (n) system ((physical chemistry) a sample of matter in which substances in different phases are in equilibrium) "in a static system oil cannot be replaced by water on a surface"; "a system generating hydrogen peroxide"
S: (n) residue (matter that remains after something has been removed)
S: (n) solid (matter that is solid at room temperature and pressure)
S: (n) solute (the dissolved matter in a solution; the component of a solution that changes its state)
S: (n) emanation (something that is emitted or radiated (as a gas or an odor or a light, etc.))
S: (n) part, portion, component part, component, constituent (something determined in relation to something that includes it) "he wanted to feel a part of something bigger than himself"; "I read a portion of the manuscript"; "the smaller component is hard to reach"; "the animal constituent of plankton"
S: (n) substance (the real physical matter of which a person or thing consists) "DNA is the substance of our genes"
S: (n) item, point (a distinct part that can be specified separately in a group of things that could be enumerated on a list) "he noticed an item in the New York Times"; "she had several items on her shopping list"; "the main point on the agenda was taken up first"
S: (n) butt (the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots)
S: (n) basis, base (the most important or necessary part of something) "the basis of this drink is orange juice"
S: (n) detail, particular, item (a small part that can be considered separately from the whole) "it was perfect in all details"
S: (n) unit (an individual or group or structure or other entity regarded as a structural or functional constituent of a whole) "the reduced the number of units and installations"; "the word is a basic linguistic unit"
S: (n) member (anything that belongs to a set or class) "snakes are members of the class Reptilia"; "members of the opposite sex"
S: (n) remainder, balance, residual, residue, residuum, rest (something left after other parts have been taken away) "there was no remainder"; "he threw away the rest"; "he took what he wanted and I got the balance"