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[floo r-ap-uh-tahyt, flawr-, flohr-] /flʊərˈæp əˌtaɪt, flɔr-, floʊr-/

a crystalline mineral, Ca 5 (PO 4) 3 F, formed from hydroxyapatite in the presence of fluoride, that has a hardening effect on bones and teeth.
a mineral consisting of calcium fluorophosphate; the most common form of apatite


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