Definition of tartar noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈtɑːtə(r)//
    ; NAmE NAmE//ˈtɑːrtər//
    Mouth and teeth
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  1. 1[uncountable] a hard substance that forms on teeth a build-up of tartar See related entries: Mouth and teeth
  2. 2[countable] (old-fashioned) a person in a position of authority who is very bad-tempered
  3. Word Originlate Middle English: via medieval Latin from medieval Greek tartaron, of unknown origin.
See the Oxford Advanced American Dictionary entry: tartar

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