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apatite

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apatite

Main Entry:: ap·a·tite
Pronunciation:: \ˈa-pə-ˌtīt\
Function:: noun
Etymology:: German Apatit, from Greek apatē deceit
Date:: 1803

: any of a group of calcium phosphate minerals occurring in various colors as hexagonal crystals, as granular masses, or in fine-grained masses as the chief constituent of phosphate rock and of bones and teeth ; especially : calcium phosphate fluoride

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