Meaning of senarmontite

sen•ar•mon•tite

Pronunciation: (sen"ur-mon'tīt), [key]
— n.
  1. a mineral, antimony trioxide, SbO, occurring in pearl-colored isometric octahedrons: a dimorph of valentinite.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.