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Meaning of allemontite

al•le•mont•ite

Pronunciation: (al"u-mon'tīt), [key]
— n.
  1. a white to gray, brittle mineral, antimony arsenide, AsSb, occurring in reniform masses: formerly used as an ore of arsenic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.