S: (n) constant (a number representing a quantity assumed to have a fixed value in a specified mathematical context) "the velocity of light is a constant"
S: (n) oxidation number, oxidation state (the degree of oxidation of an atom or ion or molecule; for simple atoms or ions the oxidation number is equal to the ionic charge) "the oxidation number of hydrogen is +1 and of oxygen is -2"
S: (n) cardinality ((mathematics) the number of elements in a set or group (considered as a property of that grouping))
S: (n) count (the total number counted) "a blood count"
S: (n) factor (any of the numbers (or symbols) that form a product when multiplied together)
S: (n) base, radix ((numeration system) the positive integer that is equivalent to one in the next higher counting place) "10 is the radix of the decimal system"
S: (n) atomic number (the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element)
S: (n) baryon number (a number equal to the difference between the number of baryons and the number of antibaryons in any subatomic structure; it is conserved in all types of particle interactions)
S: (n) quota (a prescribed number) "all the salesmen met their quota for the month"
S: (n) square, second power (the product of two equal terms) "nine is the second power of three"; "gravity is inversely proportional to the square of the distance"
S: (n) cube (any of several tropical American woody plants of the genus Lonchocarpus whose roots are used locally as a fish poison and commercially as a source of rotenone)