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[bey-mahyt, boh-] /ˈbeɪ maɪt, ˈboʊ-/
a mineral, hydrous aluminum oxide, AlO(OH), a major component of bauxite.
1925-30; < German Böhmit, named after J. Böhm, 20th-century German scientist; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for boehmite


a grey, red, or brown mineral that consists of alumina in rhombic crystalline form and occurs in bauxite. Formula: AlO(OH)
Word Origin
C20: from German Böhmit, after J. Böhm, 20th-century German scientist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Encyclopedia Article for boehmite

white and relatively soft basic aluminum oxide [AlO(OH)] that is a common mineral in bauxite, in which it forms disseminated grains or pealike masses. It is especially abundant in European bauxites, sometimes as the main constituent; bauxites from the Western Hemisphere commonly contain only a few percent boehmite. Deposits exist at Gant and Baratka, Hung.; Stangenrode, Ger.; Ayr, Scot.; and Recoux, Pereille, and Cadarcet, France. Boehmite is dimorphous (identical in composition but differing in crystal structure) with diaspore; its crystals have orthorhombic symmetry. For detailed physical properties, see oxide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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