Cystine Definition
sĭstēn
noun
A nonessential amino acid, C4H6(NH2)2S2(COOH)2
Webster's New World
Other Word Forms of Cystine
Noun
Singular:
cystine
Plural:
cystinesOrigin of Cystine
From Ancient Greek κύστις (kustis, “bladder”), where it was found.
From Wiktionary
From its discovery in bladder stones
From American Heritage Dictionary of the English Language, 5th Edition