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realgar

[ ree-al-ger, -gahr ]

noun

  1. arsenic disulfide, As 2 S 2 , found in nature as an orange-red mineral and also produced artificially: used in pyrotechnics.


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
“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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Word History and Origins

Origin of realgar1

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

Origin of realgar1

C14: via Medieval Latin from Arabic rahj al-ghar powder of the mine
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Example Sentences

A mounting medium of the highest refractive index, such as realgar, is required to resolve the stri.

Then his wife untied him, carried him to bed, and gave him wine mingled with realgar to drink.

As for the refining of Metals, the Indians are wholly ignorant of it, being content with the Realgar.

Cinnabar, realgar, orpiment and coal form the rest of the mineral products of Kwei-chow.

An alternative to the above process is to hasten the earlier part of the liming by employing sodium sulphide instead of realgar.

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