Noun
extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds
Source: WordNetIn 1960, Swinton accordingly proposed that the name Archaeopteryx lithographica be placed on the official genera list making the alternative names Griphosaurus and Griphornis invalid. Source: Internet
Evolution and classification main Archaeopteryx lithographica is often considered the oldest known true bird. Source: Internet