Definition of pterodactylian in English:
pterodactylian
adjective ˌtɛrədakˈtɪlɪən
Of, relating to, or characteristic of the genus Pterodactylus or the family Pterodactylidae; resembling a pterodactyl.
Origin
Mid 19th century. From pterodactyl or its etymon scientific Latin Pterodactylus + -ian.