The Collaborative International Dictionary of English v.0.48:
Pterodactyl \Pter`o*dac"tyl\, n. [Gr. ? a wing + ? finger, toe: cf. F. pt['e]rodactyle.] (Paleon.) An extinct flying reptile; one of the Pterosauria. See Illustration in Appendix. [1913 Webster]WordNet (r) 3.0 (2006):
pterodactyl n 1: extinct flying reptile