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[wil-uh-mahyt] /ˈwɪl əˌmaɪt/
a mineral, a zinc silicate, Zn 2 SiO 4 , sometimes containing manganese, occurring in prismatic crystals or granular masses, usually greenish, sometimes white, brown, or red: a minor ore of zinc.
Origin of willemite
1835-45; named after King Willem I; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for willemite
Historical Examples
  • In the New Jersey mines the zinc ores are the oxides zincite and willemite, and the zinc-iron oxide franklinite.

    The A B C of Mining Charles A. Bramble
British Dictionary definitions for willemite


a secondary mineral consisting of zinc silicate in hexagonal crystalline form. It is white, colourless, or coloured by impurities and is found in veins of zinc ore. Formula: Zn2SiO4
Word Origin
C19: from Dutch willemit, named after Willem I of the Netherlands (1772–1843)
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
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