πτέρωσις

English (LSJ)

εως, ἡ,

   A plumage, Ar.Av.94,97; ἀπολαμβάνειν τὴν π., opp. πτερορρυεῖν, Arist. HA564b2, cf. 601b6, PA642b24.    2 feathering of arrows, Aen. Tact.31.27.    3 pl., names of parts of surgical machines, Orib. 49.4.9, al.    II metaph., λόγων πτέρωσις (cf. πτερόεις 11) Jul.Ep. 193.