realgar
nounUK /ɹiˈæl.ɡɑː/ · US /ɹiˈæl.ɡɑɹ/
Etymology From Middle English realgar, from Medieval Latin realgar, resalgar, from Arabic رَهْج اَلْغَار (rahj al-ḡār, literally “cave dust”).
1
Chemistry, Geography, Geology, Mineralogy, Natural sciences, Physical sciences Usually A mineral, arsenic sulfide (AsS), often associated with orpiment and stibnite in lead, silver and gold ores.
- Derived terms
- pararealgar, realgar orange, realgar wine, realgar yellow