Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A colorless, vitreous to resinous, often fluorescent mineral, Zn2SiO4, a minor ore of zinc.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rare mineral, zinc silicate, Zn2SiO4, that is a minor ore of zinc.

from the GNU version of the Collaborative International Dictionary of English

  • n. A silicate of zinc, usually occurring massive and of a greenish yellow color, also in reddish crystals (troostite) containing manganese.

from The Century Dictionary and Cyclopedia

  • n. A mineral of resinous luster and yellowish-green or flesh-red color, a native silicate of zinc.

Etymologies

Dutch willemit, after Willem I (1772-1843), king of the Netherlands.
(American Heritage® Dictionary of the English Language, Fourth Edition)
In honour of Willem I, king of the Netherlands (Wiktionary)

Examples

  • Fellowship at Princeton University for postdoctoral work, at which time he began a study of photoconductivity in willemite crystals.

    Robert Hofstadter - Biography

  • Sphalerite or blende (zinc sulfide), the original zinc ore, smithsonite, hydrozincite, willemite.

    13. Glaze oxides

  • Zincite (zinc oxide) and willemite (zinc silicate) are the important minerals in the deposits of Franklin Furnace, New Jersey.

    The Economic Aspect of Geology

  • They consist of willemite and zincite, together with large amounts of franklinite (an iron-manganese oxide) and silicates, in a pre-Cambrian white crystalline limestone near its contact with a coarse-grained granite-gneiss.

    The Economic Aspect of Geology

  • Why, only those rays invisible to the human eye, but which make this piece of willemite glow -- the ultraviolet rays. "

    The Poisoned Pen

  • Why, only those rays invisible to the human eye, but which make this piece of willemite glow -- the ultra-violet rays. "

    Master Tales of Mystery, Volume 3

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