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realgar

[ree-al-ger, -gahr] /riˈæl gər, -gɑr/
noun
1.
arsenic disulfide, As 2 S 2 , found in nature as an orange-red mineral and also produced artificially: used in pyrotechnics.
Also called red orpiment.
Origin of realgar
1350-1400
1350-1400; Middle English < Medieval Latin realgerArabic rahj al-ghār powder of the mine or cave
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Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for realgar

realgar

/rɪˈælɡə/
noun
1.
a rare orange-red soft mineral consisting of arsenic sulphide in monoclinic crystalline form. It occurs in Utah and Romania and as a deposit from hot springs. It is an important ore of arsenic and is also used as a pigment. Formula: AsS
Word Origin
C14: via Medieval Latin from Arabic rahj al-ghar powder of the mine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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