An Etymological Dictionary of Astronomy and Astrophysics

1. The branch of chemistry that studies chemical processes within the context of the laws of definite proportions and conservation of matter and energy.
   

2. The study of the quantitative relationships of two or more compounds in
   a chemical reaction.

Etymology (EN): From Gk. stoikheion “element, component, principle,” Stoikheia “elements” (the title of Euclid’s great collection of Gk. mathematics); loaned in Ar. and Pers. (9-th century A.D.) as ustuqus (اسطقس); akin to stoikhos “row, line, verse,” steikhein “to go, march;” cf. Skt. stighnoti “rises, steps;”
O.H.G. stigan; Ger. steigen; Goth. steigan “to go up, ascend;” O.E. stigan “to climb, go;” Ger. Steig “path;” O.E. stig “narrow path;” PIE base *steigh- “to go, rise, step, walk,”

• → -metry.

Etymology (PE): Stoyxiyosanji, from stoyxiyo loan from Gk., as above, + -sanji, → -metry.