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Pronunciation: bē′tă-īn


  1. An oxidation product of choline and a transmethylating intermediate in metabolism.
  2. A class of compounds related to betaine. (1) (R3N+—CHR′—COO−), glycine betaine.

Synonym(s): glycine betaine

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.