ar·chae·op·ter·yx /ˌɑrkiˈɑptərɪks/
Ar·chæ·op·te·ryx n. Paleon. A fossil bird, of the Jurassic period, remarkable for having a long tapering tail of many vertebræ with feathers along each side, and jaws armed with teeth, with other reptilian characteristics.
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archaeopteryx
n : extinct primitive toothed bird of the Jurassic period having
a long feathered tail and hollow bones; usually
considered the most primitive of all birds [syn: archeopteryx,
Archaeopteryx lithographica]