| APATITE | • apatite n. (Mineralogy) A calcium fluoride phosphate of variable composition, sometimes used in the manufacture… • APATITE n. a mineral, calcium fluoride phosphate, used as a fertilizer. |
| CARBONATITE | • carbonatite n. (Geology) Any intrusive igneous rock having a majority of carbonate minerals. • CARBONATITE n. any igneous rock composed chiefly of carbonates rather than silicates. |
| ENSTATITE | • enstatite n. (Mineralogy) A form of pyroxene consisting solely of magnesium silicate. • ENSTATITE n. a mineral of the pyroxene group, a silicate of magnesia with some iron. |
| FLUORAPATITE | • fluorapatite n. (Mineralogy) A calcium halophosphate mineral, in which fluoride replaces the hydroxide of apatite, that… • FLUORAPATITE n. a mineral consisting of calcium phosphate fluoride, the most common form of apatite. |
| GONIATITE | • goniatite n. Any member of the extinct Goniatitida, a taxonomic order of ammonites. • GONIATITE n. one of an extinct genus of fossil cephalopods, allied to the Ammonites. |
| HAEMATITE | • haematite n. (Chiefly British spelling) Alternative spelling of hematite. • hæmatite n. Alternative spelling of hematite. • HAEMATITE n. an ore of iron, also HEMATITE. |
| HEMATITE | • hematite n. (Mineralogy) An iron ore, mainly peroxide of iron, Fe2O3. • HEMATITE n. an ore of iron, also HAEMATITE. |
| HEPATITE | • hepatite n. (Mineralogy, dated) A variety of barite that emits a foetid odour when rubbed or heated. • HEPATITE n. a variety of barite emitting a fetid odor when rubbed or heated. |
| HYDROXYAPATITE | • hydroxyapatite n. A basic calcium phosphate mineral that is the principal inorganic constituent of bone and teeth. • HYDROXYAPATITE n. a complex phosphate of calcium that occurs as a mineral and is the chief structural element of vertebrate bone. |
| HYDROXYLAPATITE | • hydroxylapatite n. Alternative spelling of hydroxyapatite. • HYDROXYLAPATITE n. a mineral of the apatite group that is rare in the ground but is the principal inorganic constituent of tooth enamel and bone. |
| MICROPEGMATITE | • micropegmatite n. (Mineralogy) A rock showing under the microscope the structure of pegmatite. • MICROPEGMATITE n. a microscopic intergrowth of quartz and feldspar. |
| MIGMATITE | • migmatite n. (Geology) Any rock of mixed appearance, being an intimate mixture of granite and older rock, specifically… • MIGMATITE n. a type of rock containing igneous and metamorphic elements. |
| PEGMATITE | • pegmatite n. A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally… • PEGMATITE n. a coarsely crystallized rock commonly occurring in igneous intrusions, esp. dykes, and consisting mainly of feldspar and quartz. |
| RATITE | • ratite adj. Pertaining to the order Struthioniformes (as opposed to carinate). • ratite n. A bird of the order of Struthioniformes, a diverse group of large running, flightless birds, mostly… • RATITE n. a bird having a flat breastbone, such as ostrich, emu. |
| STEATITE | • steatite n. (Mineralogy) soapstone. • STEATITE n. the massive talc that is used in paints, ceramics, and insulation. |
| SYNTAGMATITE | • syntagmatite n. (Mineralogy) A basaltic variety of hornblende. • SYNTAGMATITE n. a kind of hornblende. |
| ZARATITE | • zaratite n. (Mineralogy) a hydrous basic nickel carbonate occurring in emerald-green incrustations or compact masses. • ZARATITE n. a mineral, a hydrous carbonate of nickel. |