tartar

noun

1. An incrustation on the teeth consisting of plaque that has become hardened by the deposition of mineral salts (such as calcium carbonate)
2. A substance consisting essentially of cream of tartar that is derived from the juice of grapes and deposited in wine casks together with yeast and other suspended matters as a pale or dark reddish crust or sediment

noun

1. A native or inhabitant of Tartary
2. Tatar
3. A person of irritable or violent temper
4. One that proves to be unexpectedly formidable

noun

1. A poisonous efflorescent crystalline salt C₈H₄K₂O₁₂Sb₂·3H₂O of sweetish metallic taste that is used in dyeing as a mordant and especially formerly in medicine as an emetic and expectorant

noun

1. A sauce made principally of mayonnaise and chopped pickles

noun phrase

1. A white crystalline salt C₄H₅KO₆ used especially in baking powder and in certain treatments of metals