a black, yellowish, or reddish-brown mineral, found in igneous rocks, metamorphosed limestones, and quartz veins. It is a source of titanium. Composition: titanium dioxide. Formula: TiO2. Crystal structure: tetragonal
WordReference Random House Unabridged Dictionary of American English © 2025
ru•tile
(ro̅o̅′tēl, -tīl),USA pronunciation n.
- Mineralogya common mineral, titanium dioxide, TiO2, usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods.
- Latin rutilus red1
- German Rutil
- French
- 1795–1805
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