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rutile

[roo-teel, -tahyl] /ˈru til, -taɪl/
noun
1.
a common mineral, titanium dioxide, TiO 2 , usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods.
Origin
1795-1805
1795-1805; < French < German Rutil < Latin rutilus red1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rutile

rutile

/ˈruːtaɪl/
noun
1.
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
Word Origin
C19: via French from German Rutil, from Latin rutilus red, glowing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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rutile in Science
rutile
  (r'tēl', -tīl')   
A lustrous red, reddish-brown, or black tetragonal mineral that is an ore of titanium. Rutile usually occurs as prismatic crystals in other minerals, especially as dark needlelike crystals in quartz. Chemical formula: TiO2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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