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

  • n. A transparent, green variety of garnet used as a gem.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a green garnet

from the GNU version of the Collaborative International Dictionary of English

  • n. A yellow-green, transparent variety of garnet found in the Urals. It is valued as a gem because of its brilliancy of luster, whence the name.

from The Century Dictionary and Cyclopedia

  • n. A light-green to emerald-green variety of garnet, found in the Ural mountains. It is transparent and of brilliant luster, and is classed as a gem.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a green andradite used as a gemstone


German, from archaic Demant, diamond, from Middle High German diemant, from Old French diamant; see diamond.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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  • An orbiting rock claims it's planetoid;
    Devices assert that they’re android.
    If a stone cannot muster
    A diamond's bright lustre
    It struts its poor stuff as demantoid.

    See also Altoids.

    February 20, 2015

  • Green form of andradite with an adamantine luster.

    June 2, 2010