tartar : Idioms & Phrases

• noun a salt used especially in baking powder
  potassium bitartrate; tartar; potassium hydrogen tartrate.
  

WordNet

• (Chem.), purified tartar or argol; so called because of the crust of crystals which forms on the surface of the liquor in the process of purification by recrystallization. It is a white crystalline substance, with a gritty acid taste, and is used very largely as an ingredient of baking powders; called also potassium bitartrate, acid potassium tartrate, etc.

Webster 1913

• noun Australian tree having an agreeably acid fruit that resembles a gourd
  Adansonia gregorii; sour gourd.
  

WordNet

• (Old Chem.), potassium carbonate; so called because formerly made by heating cream of tartar, or potassium tartrate. Obs.

Webster 1913

• . See Tartar emetic, under Tartar.

Webster 1913

• noun a poisonous colorless salt used as a mordant and in medicine
  antimony potassium tartrate.
  

WordNet

• (Med. Chem.), a double tartrate of potassium and basic antimony. It is a poisonous white crystalline substance having a sweetish metallic taste, and used in medicine as a sudorific and emetic.

Webster 1913

• noun mayonnaise with chopped pickles and sometimes capers and shallots and parsley and hard-cooked egg; sauce for seafood especially fried fish
  tartare sauce.
  

WordNet

• noun ground beef mixed with raw egg and e.g. onions and capers and anchovies; eaten raw
  steak tartare; cannibal mound.
  

WordNet

• to lay hold of, or encounter, a person who proves too strong for the assailant. Colloq.

Webster 1913