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

Word History and Origins

Origin of realgar¹

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

Word History and Origins

Origin of realgar¹

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

Example Sentences

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

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg