English
pteropsin
From ptero- + opsin.
Proto-Indo-European *peth₂- ‘to fly’
Proto-Indo-European *péth₂r̥ ‘feather’
Proto-Hellenic *pterón
Ancient Greek πτερόν ‘wing, feather’
English ptero-
Today it means
noun A non-visual opsin present in some winged insects
Language periods are conventional ranges, not dates for this word.
Etymograph / pteropsin