| 单词 | protoavis |
| 释义 | protoavis[ proh-toh-ey-vis ] / ˌproʊ toʊˈeɪ vɪs / nouna 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. Origin of protoavis<New Latin (1986), equivalent to Greek proto-proto- + Latin avis bird Words nearby protoavisprotistology, protium, proto-, protoactinium, Proto-Algonquian, protoavis, protocal, protochordate, protocol, protocols, protocontinent Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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