stibnite

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stib·nite

 (stĭb′nīt′)
n.
A lead-gray mineral, Sb2S3, that is the chief source of antimony.

[French stibine, stibnite (from Latin stibium, antimony; see stibine) + -ite.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

stibnite

(ˈstɪbnaɪt)
n
(Minerals) a soft greyish mineral consisting of antimony sulphide in orthorhombic crystalline form. It occurs in quartz veins and is the chief ore of antimony. Formula: Sb2S3
[C19: from obsolete stibine stibnite + -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

stib•nite

(ˈstɪb naɪt)

n.
a soft, lead-gray mineral, antimony trisulfide, Sb2S3, found in radiating groups of long prismatic crystals and in granular masses: the principal ore of antimony.
[1850–55; stib (i) ne (in obsolete sense “stibnite”) + -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.stibnite - a soft grey mineralstibnite - a soft grey mineral; the chief ore of antimony
antimony, atomic number 51, Sb - a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
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