The Collaborative International Dictionary
lycine
Betaine \Be"ta*ine\, n. [From beta, generic name of the beet.] (Chem.) A nitrogenous base, C5H11NO2, produced artificially, and also occurring naturally in beet-root molasses and its residues, from which it is extracted as a white crystalline substance; -- called also lycine and oxyneurine. It has a sweetish taste.
Wiktionary
lycine
n. (context chemistry English) A weak base identical with betaine.