realgar

[ ree-al-ger, -gahr ]

/ riˈæl gər, -gɑr /

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noun

arsenic disulfide, As2S2, found in nature as an orange-red mineral and also produced artificially: used in pyrotechnics.

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Also called red orpiment.

Origin of realgar

1350–1400; Middle English <Medieval Latin realger ≪ Arabic rahj al-ghār powder of the mine or cave

Words nearby realgar

real ale, real axis, real cost, real estate, real-estate investment trust, realgar, realia, realign, realignment, real income, realism

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use realgar in a sentence

A mounting medium of the highest refractive index, such as realgar, is required to resolve the stri.
The Diatomaceae of Philadelphia and Vicinity|Charles Sumner Boyer
Then his wife untied him, carried him to bed, and gave him wine mingled with realgar to drink.
The Chinese Fairy Book|Various
As for the refining of Metals, the Indians are wholly ignorant of it, being content with the Realgar.
A New Voyage to Carolina|John Lawson
Cinnabar, realgar, orpiment and coal form the rest of the mineral products of Kwei-chow.
Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 8|Various

An alternative to the above process is to hasten the earlier part of the liming by employing sodium sulphide instead of realgar.
Animal Proteins|Hugh Garner Bennett

British Dictionary definitions for realgar

realgar

/ (rɪˈælɡə) /

noun

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 for realgar

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