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realgar

noun
re·​al·​gar | \ rē-ˈal-ˌgär How to pronounce realgar (audio) , -gər\

Definition of realgar

: an orange-red mineral consisting of arsenic sulfide and having a resinous luster

First Known Use of realgar

15th century, in the meaning defined above

History and Etymology for realgar

Middle English, from Medieval Latin, from Catal, from Arabic rahj al-ghār powder of the mine

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