realgar

• rosaker
• resalgar, resegall, resegallum (obsolete)

From Middle English realgar, from Medieval Latin realgar, resalgar, from Arabic رَهْج اَلْغَار‎ (rahj al-ḡār, literally “cave dust”).

• (UK) IPA^(key): /ɹiˈæl.ɡɑː/, /ɹiˈæl.ɡə/
• (US) IPA^(key): /ɹiˈæl.ɡɑɹ/, /ɹiˈæl.ɡɚ/

realgar (usually uncountable, plural realgars)

1. (mineralogy) A mineral, arsenic sulfide (AsS), often associated with orpiment and stibnite in lead, silver and gold ores.

• pararealgar

• orpiment
• cinnabar

• David Barthelmy (1997–2023), “Realgar”, in Webmineral Mineralogy Database.
• “realgar”, in Mindat.org‎, Hudson Institute of Mineralogy, 2000–2023.

From Arabic رَهْج اَلْغَار‎ (rahj al-ḡār, literally “cave dust”).

realgar n (genitive realgāris); third declension

1. realgar (arsenic disulfide)

Third-declension noun (neuter, “pure” i-stem).

• R. E. Latham, D. R. Howlett, & R. K. Ashdowne, editors (1975–2013), “realgar”, in Dictionary of Medieval Latin from British Sources‎, London: Oxford University Press for the British Academy, →ISBN, OCLC 1369101

From French réalgar.

realgar n (uncountable)

1. realgar