An essential amino acid, CH3SCH2CH2CH(NH2)COOH, that contains sulfur, obtained from various proteins and used as a food supplement and in medicine.
Webster's New World
Other Word Forms of Methionine
Origin of Methionine
From me(thyl) + thio- + (euphonic) -n- +"Ž -ine.
me(th)– thion– –ine
From American Heritage Dictionary of the English Language, 5th Edition
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