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: 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
especially
: a recrystallized product yielding cream of tartar on further purification
Tartar
adjective
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Merriam-Webster unabridged
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- Namesake of the leotard, Jules Léotard had what profession?


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