an Australian parakeet (Melopsittacus undulatus) having a greenish-yellow body, marked with bright blue on the cheeks and tail feathers, and wings striped with brown
See budgerigar in American Heritage Dictionary 4
A parakeet (Melopsittacus undulatus) native to Australia and having green, yellow, or blue plumage. It is a popular cage bird bred in a variety of colors not found in wild populations. Also called shell parakeet.
Origin: Probably alteration of Kamilaroi (Aboriginal language of southeast Australia) gijirrigaa