Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

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

Century Dictionary and Cyclopedia

  1. n. One of the three forms in which titanium dioxid occurs in nature. (See also octahedrite and brookite.) It crystallizes in tetragonal crystals, generally in square prisms, often in geniculated twins. It has a brilliant metallic-adamantine luster, and reddish-brown to black color. The crystals are often black by reflected and deep-red by transmitted light. They are sometimes cut for jewels. Nigrin is a black ferriferous variety, and sagenite a variety consisting of acicular crystals often penetrating transparent quartz. The latter is also called Venus's-hair stone and love's-arrows.

Wiktionary

  1. n. The most frequent of the three polymorphs of titanium dioxide, crystalizing in the tetragonal system, TiO2.

GNU Webster's 1913

  1. n. A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite.

WordNet 3.0

  1. n. a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium

Etymologies

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

Examples

  • “The star sapphire does, not the rutile that causes it.”

    Update

  • “The quartzite shows granoblastic and blastopsammitic texture, with grain sizes varying from coarse sand to very fine pebble and with minor microcrystals of sericite, fuchsite, andalusite and iron oxide, besides detrital tourmaline, rutile, and zircon." link”

    Archive 2008-03-01

  • “Most heavy-mineral sands also have a high content of titanium-bearing minerals, such as ilmenite and rutile.”

    Zirconium

  • “The sand is siliceous and, as with other sand masses on the New South Wales north coast, contains significant quantities of the heavy minerals rutile, zircon and ilmenite.”

    Central Eastern Rainforest Reserves, Australia

  • “University of Natal geologist Dr Ron Uken says in terms of the environment, mining coastal dunes for titanium minerals such as ilmenite and rutile "leaves nothing".”

    ANC Daily News Briefing

  • “Under British colonial rule the country was one of the most successful in West Africa partly because of its richness in diamonds and rutile, or titanium dioxide.”

    Simon & Schuster: DELIVER US FROM EVIL

  • “Despite its diamonds, rutile and bauxite, the country was wrecked by the mid-1980s.”

    Simon & Schuster: DELIVER US FROM EVIL

  • “The cube became colorless again save for the rutile and other inclusions.”

    Carnivores of Light and Darkness

  • “Refractory oxides, such as chrome oxide and rutile, can cause crawling.”

    10. Decoration

  • “The pure TiO2 will work as rutile with an addition of about 5% iron oxide.”

    13. Glaze oxides

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‘rutile’ has been looked up 702 times, added to 6 lists, and has a Scrabble score of 6.