from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A lustrous red, reddish-brown, or black mineral, TiO2, used as a gemstone, as an ore, and in paints and fillers.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The most frequent of the three polymorphs of titanium dioxide, crystalizing in the tetragonal system, TiO2.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite.
from The Century Dictionary and Cyclopedia
- n. One of the three forms in which titanium dioxid occurs in nature. (See also octahedrite and brookite.)
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium
French, from German Rutil, from Latin rutilus, red; see rutilant.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin rutilus ("red") because of its common color, named in 1803. (Wiktionary)