| 单词 | protoavis |
| 释义 | protoavis in British English (ˌprəʊtəʊˈeɪvɪs) noun a bird-like creature from the late Triassic period protoavis in American English (ˌproutouˈeivɪs) noun 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 Word origin [‹ NL (1986), equiv. to Gk proto- proto- + L avis bird]proto- is a combining form meaning “first,” “foremost,” “earliest form of,” used in theformation of compound words (protomartyr; protolithic; protoplasm), specialized in chemical terminology to denote the first of a series of compounds,or the one containing the minimum amount of an element |
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