nonmetallic element, the name coined 1810 by English chemist Sir Humphry Davy from Latinized form of Greek khlōros "pale green" (from PIE root *ghel- (2) "to shine," with derivatives denoting "green" and "yellow") + chemical suffix -ine (2). Named for its color. Discovered 1774, but known at first as oxymuriatic acid gas, or dephlogisticated marine acid.
1630s, "a sticky substance," from French gluten "sticky substance" (16c.) or directly from Latin gluten (glutin-) "glue" (see glue (n.)). Used 16c.-19c. for the part of animal tissue now called fibrin; used since 1803 of the nitrogenous part of the flour of wheat or other grain; hence glutamic acid (1871), a common amino acid, and its salt, glutamate.
"pellagra-preventing vitamin in enriched bread," 1942, coined from first syllables of nicotinic acid (see nicotine) + chemical suffix -in (2). It was suggested by the American Medical Association as a more commercially viable name than nicotinic acid.
The new name was found to be necessary because some anti-tobacco groups warned against enriched bread because it would foster the cigarette habit. ["Cooperative Consumer," Feb. 28, 1942]