methionine - Dictionary definition and pronunciation - Yahoo! Education

Definition of methionine


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me·thi·o·nine  audio  (m-th-nn) KEY 

NOUN:
A sulfur-containing essential amino acid, C5H11NO2S, obtained from various proteins or prepared synthetically and used as a dietary supplement and in pharmaceuticals.

ETYMOLOGY:
me(th)- + thion- + -ine2


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