From the scholia to Aristophanes, Ecclesiazusae 625, where the accusative plural headword occurs (of women sexually shunning ugly men) in this sense; it is sense II.1 in LSJ s.v. ai)sxr/os.
The headword is a comparative form of the adjective; see also alphaiota 351. The gloss uses a simple form: the adjective a)/morfos, literally "shapeless"; for its close connection with ai)sxro/s see also alphaiota 353.