protoavis
/proh-toh-ey-vis/US // ˌproʊ toʊˈeɪ vɪs //
原生代,原子星
Definitions
n.名词 noun
- 1
- : a fossil bird of the genus Protoavis, from the Triassic Period, having a birdlike, partly toothless jaw structure, a tail and hind legs resembling those of the dinosaur, and the hollow bones and keellike breast that are characteristic of modern birds: the oldest known avian type, preceding the archaeopteryx by an estimated 75 million years.
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