Based on the Random House Dictionary, © Random House, Inc. 2012.
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| (used as a nonsense word by children to express approval or to represent the longest word in English.) |
| a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S. |
hydroxyapatite hy·drox·y·ap·a·tite (hī-drŏk'sē-āp'ə-tīt')
n.
The principal bone salt that provides the compressional strength of vertebrate bone.
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hydroxyapatite
phosphate mineral, calcium hydroxide phosphate [Ca5(PO4)3OH], that forms glassy, often green crystals and masses. It is seldom pure in nature but often occurs mixed with fluorapatite, in which fluorine substitutes for the hydroxyl (OH) group in the molecule. This mixture, called a solid-solution series, is a continuous chemical variation between the two pure substances. Collophane, the apatite in fossil bone and phosphate rock belongs to the series. For physical properties, see phosphate mineral (table)
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