methionine

From methyl +‎ thio- +‎ -n- +‎ -ine.

• (UK) IPA^(key): /mɪˈθʌɪəniːn/, /mɪˈθʌɪənɪn/
• (US) IPA^(key): /mɛˈθaɪəˌniːn/, /-ˌnaɪn/

methionine (countable and uncountable, plural methionines)

2. (biochemistry, organic chemistry) A sulphur-containing amino acid, C₅H₁₁NO₂S, in L- and D-forms.
   2. (biochemistry, organic chemistry) The L-form thereof, a lipotropic molecule widely occurring in living organisms and found in most protein; in humans it is an essential amino acid.

      Alternative forms: Met, M (IUPAC symbols)

      • 1999, Matt Ridley, Genome, Harper Perennial, published 2004, page 253:

        The purpose was to make soya beans more healthy for those for whom they are a staple food by correcting soya beans' natural deficiency in a chemical called methionine.

• methionine on Wikipedia.Wikipedia