WordReference Random House Unabridged Dictionary of American English © 2020
bi•tar•trate  (bī tärtrāt),USA pronunciation n. [Chem.]
  1. Chemistrya tartrate in which only one of the two acidic hydrogen atoms of tartaric acid is replaced by a metal or positive group;
    an acid tartrate;
    a hydrogen tartrate, as sodium bitartrate.
  • bi-1 + tartrate 1875–80

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