from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sulfur-containing essential amino acid, C5H11NO2S, obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sulphur-containing essential amino acid, C5H11NO2S, found in most protein; it is lipotropic.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a crystalline amino acid containing sulfur; found in most proteins and essential for nutrition
me(th)- + thion- + -ine2.(American Heritage® Dictionary of the English Language, Fourth Edition)
From me(thyl) + thio- + (euphonic) -n- + -ine. (Wiktionary)