rutile

ru·tile  (rtl, -tl)

n.

A lustrous red, reddish-brown, or black mineral, TiO₂, used as a gemstone, as an ore, and in paints and fillers.

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[French, from German Rutil, from Latin rutilus, red; see rutilant.]

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rutile [ˈruːtaɪl]

n

(Earth Sciences / 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

[via French from German Rutil, from Latin rutilus red, glowing]

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rutile  (rtl, -tl)

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.

Thesaurus

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