rutile
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ru·tile
(ro͞o′tēl′, -tīl′)n.
A lustrous red, reddish-brown, or black mineral, TiO2, used as a gemstone, as an ore, and in paints and fillers.
[French, from German Rutil, from Latin rutilus, red; see rutilant.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
rutile
(ˈruːtaɪl)n
(Minerals) 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
[C19: via French from German Rutil, from Latin rutilus red, glowing]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ru•tile
(ˈru til, -taɪl)n.
a dark red, brilliant mineral, titanium dioxide, TiO2, occurring in needlelike crystals and granular masses: used to coat welding rods.
[1795–1805; < French < German Rutil < Latin rutilus red]
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Noun | 1. | rutile - a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium atomic number 22, Ti, titanium - a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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