Main Entry: stoi·chi·om·e·try

Pronunciation: \ˌstȯi-kē-ˈä-mə-trē\

Function: noun

Etymology: Greek stoicheion element (from stoichos row) + English -metry; akin to Greek steichein to walk, go — more at stair

Date: 1807

1 : a branch of chemistry that deals with the application of the laws of definite proportions and of the conservation of mass and energy to chemical activity
2 a : the quantitative relationship between constituents in a chemical substance b : the quantitative relationship between two or more substances especially in processes involving physical or chemical change