英语释义
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n. pl. An order of extinct mesozoic reptiles, mostly of
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large size (whence the name). Notwithstanding their size, they present
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birdlike characters in the skeleton, esp. in the pelvis and hind limbs.
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Some walked on their three-toed hind feet, thus producing the large
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"bird tracks," so-called, of mesozoic sandstones; others were five-toed
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and quadrupedal. See Illust. of Compsognathus, also Illustration of