stoichiometry

Noun

WordNet 3.0

Noun (1)

(chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers)

Webster's Dictionary (GCIDE)

Stoichiometry \Stoi`chi*om"e*try\, n. [Gr. ? a first principle, or element + -metry.] The art or process of calculating the atomic proportions, combining weights, and other numerical relations of chemical elements and their compounds. [1913 Webster]