orcin

Etymology tree Proto-Indo-European *h₂ew- Proto-Indo-European *-s Proto-Indo-European *h₂ṓws Proto-Italic *auzis Latin auris Proto-Indo-European *-lós Proto-Indo-European *-elós Proto-Italic *-elos Latin -ulus Latin -cula Latin auricula Latin ōriculader. Italian oricelloder. Arabic [script needed] ('urjālla)influ. Old Catalan orxellader. Old French orchel French orseilleder. Dutch orseilleder. New Latin orcinader. French orcineder. English orcin From French orcine, from New Latin orcina, from Dutch orseille, from French orseille, from Old French orchel, orseil, from Old Catalan orxella (influenced by dialectal Arabic [script needed] ('urjālla)), from Italian oricello, from Latin ōricilla, diminutive of ōricula (variant of auricula), both diminutives of auris (“ear”)) + illa (a double diminutive suffix) or from auris (“ear”) + cula + illa. The name of the dye was influenced by the visual resemblance of the lichen used in production to a small ear.

来源：wiktionary