rutile

[ roo-teel, -tahyl ]

/ ˈru til, -taɪl /

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noun

a 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.

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Origin of rutile

1795–1805; <French <German Rutil<Latin rutilusred¹

Words nearby rutile

Rutherford scattering, ruthful, ruthless, rutilant, rutilated, rutile, rutin, Rutland, Rutlandshire, Rutledge, rutter

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use rutile in a sentence

Biotite, if present, is brown; epidote is yellow or colourless; rutile, apatite and quartz all occur with some frequency.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6|Various
Its most common ore is rutile (TiO2), which resembles silica in many respects.
An Elementary Study of Chemistry|William McPherson
Rutile is much lighter, 4·2, and the streak light-brown; tourmaline is only 3·2.
Getting Gold|J. C. F. Johnson
There is no distinct cleavage (rutile and anatase have cleavages); hardness 5-6; sp.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various

Minute crystals of brookite have been detected with anatase and rutile in the iron-ore of Cleveland in Yorkshire.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various

British Dictionary definitions for rutile

rutile

/ (ˈruːtaɪl) /

noun

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: TiO 2 . Crystal structure: tetragonal

Word Origin for rutile

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for rutile

rutile

[ rōō′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.