| CEYLANITES | • ceylanites n. Plural of ceylanite. • CEYLANITE n. a mineral, pleonaste, a dark-green to black variety of spinel, also CEYLONITE. |
| COLEMANITE | • colemanite n. (Mineralogy) A white, grey or colorless mineral form of calcium borate; a principal source of boron. • COLEMANITE n. a hydrous borate of lime occurring in transparent colorless or white crystals. |
| EXURBANITE | • exurbanite n. A person who lives in an exurb. • exurbanite n. A former urbanite. • EXURBANITE n. a resident of an exurb, a residential area outside the suburbs of a town. |
| GERMANITES | • GERMANITE n. a complex mineral, basically copper arsenic sulphide. |
| MANGANITES | • manganites n. Plural of manganite. • MANGANITE n. an oxide of manganese, occurring in brilliant steel-gray or iron-black crystals. |
| MORGANITES | • morganites n. Plural of morganite. • MORGANITE n. a rosy pink semiprecious gem, a variety of beryl. |
| POLIANITES | • polianites n. Plural of polianite. • POLIANITE n. manganese dioxide, occurring in tetragonal crystals nearly as hard as quartz. |
| STEPHANITE | • stephanite n. (Mineralogy) A sulfide mineral of silver and antimony. • Stephanite n. A member of the Order of Hospitaller Canons Regular of St Stephen. • STEPHANITE n. a brittle silver ore, composed of silver, sulphur, and antimony. |
| SYLVANITES | • sylvanites n. Plural of sylvanite. • SYLVANITE n. a monoclinic telluride of gold and silver that occurs as silver or yellow crystals or masses with metallic lustre. |
| TANZANITES | • tanzanites n. Plural of tanzanite. • TANZANITE n. a gemstone that exhibits blue, violet, or greenish color depending on the polarization of the light. |
| THORIANITE | • thorianite n. (Mineralogy) A radioactive mineral containing thorium dioxide (ThO2) plus oxides of uranium, lanthanum… • THORIANITE n. a strongly radioactive mineral that is an oxide of thorium. |
| TORBANITES | • torbanites n. Plural of torbanite. • TORBANITE n. a shale, almost a coal, once mined for oil at Torbane Hill in Scotland. |
| TYMPANITES | • tympanites n. (Medicine) A distended abdomen as a result of an accumulation of gas. • TYMPANITES n. the distention of the abdomen by flatulence, also TYMPANY. |
| VIVIANITES | • vivianites n. Plural of vivianite. • VIVIANITE n. ferrous phosphate, blue by oxidation, often found coating fossil fishes and bones. |
| VULCANITES | • vulcanites n. Plural of vulcanite. • VULCANITE n. hard rubber produced by vulcanizing with a large proportion of sulphur. |