noun, masculine/rexalˈɡaɾ/plural: rejalgares
realgar; tropical milkweed (Asclepias curassavica); Colocasia antiquorum; Tabernaemontana amygdalifolia; Cascabela ovata
Borrowed from Arabic رَهْج اَلْغَار (rahj al-ḡār, “realgar”, literally “cave dust”).