| 释义 |
ap·a·tite
\ˈapəˌtīt\ noun
(-s)
Etymology: German apatit, from Greek apatēdeceit (perhaps from apo- + patos path) + German -it -ite; from its being taken for other minerals — more at find
: any of a group of calcium phosphate minerals containing other elements or radicals (as fluorine, chlorine, hydroxyl, or carbonate), having the approximate general formula Ca5(F,Cl,OH, 1/2CO3)(PO4)3, and occurring variously as hexagonal crystals, as granular masses, or in fine-grained often impure masses as the chief constituent of phosphate rock and of most or all bones and teeth; specifically : fluorapatite — see carbonate-apatite, chlorapatite, hydroxylapatite |