Brookite

Acceptable For Game Play - US & UK word lists

This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

The American Heritage® Dictionary of the English Language, 4th Edition
  • n. A mineral form of titanium dioxide, TiO2, having characteristic orthorhombic crystals and a red-brown to black color.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A dark brown mineral form of titanium dioxide, with the chemical formula TiO2.
    • the GNU version of the Collaborative International Dictionary of English
  • n. A mineral consisting of titanic oxide, and hence identical with rutile and octahedrite in composition, but crystallizing in the orthorhombic system.
    • The Century Dictionary and Cyclopedia
  • n. One of the three forms in which titanium dioxid occurs in nature.
    • Word Usage
    "Rutile is made up mostly of titanium dioxide with two rarer polymorphs anatase or octahedrite, which is a tetragonal mineral of pseudo-octahedral habit, and brookite, which is an orthorhombic mineral, the Doctor explained to her."
     
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