tartar

Từ điển Oxford Advanced Learner 8th

tar·tar [tartar tartars] BrE [ˈtɑːtə(r)] NAmE [ˈtɑːrtər] noun
1. uncountable a hard substance that forms on teeth
•a build-up of tartar
2. countable (old-fashioned)a person in a position of authority who is very bad-tempered

Word Origin:
late Middle English: via medieval Latin from medieval Greek tartaron, of unknown origin.

• Từ đồng nghĩa / Synonyms:
  calculus, tophus, Tatar, Tartar, Mongol Tatar, dragon, cream of tartar, potassium bitartrate, potassium hydrogen tartrate