any of a number of phosphates of calcium found in bones, teeth, etc. and used in medicine and in the manufacture of enamels, glass, cleaning agents, etc.
See calcium phosphate in American Heritage Dictionary 4
noun
A colorless deliquescent powder, Ca(H2PO4)2, used in baking powders, as a plant food, as a plastic stabilizer, and in glass.
A white crystalline powder, CaHPO4, used as an animal food, as a plastic stabilizer, and in glass and toothpaste.
A white amorphous powder, Ca3(PO4)2, used in ceramics, rubber, fertilizers, and plastic stabilizers and as a food supplement.