dinosauria

[医]恐龙类

n. pl. An order of extinct mesozoic reptiles, mostly of

large size (whence the name). Notwithstanding their size, they present

birdlike characters in the skeleton, esp. in the pelvis and hind limbs.

Some walked on their three-toed hind feet, thus producing the large

"bird tracks," so-called, of mesozoic sandstones; others were five-toed

and quadrupedal. See Illust. of Compsognathus, also Illustration of

Dinosaur in Appendix.

A genus of Dinosauria found in the Jurassic formation, and remarkable for having several birdlike features.

One of the Dinosauria.

A genus of huge, carnivorous, dinosaurian reptiles from the Cretaceous formation of the United States

A division of Reptilia formerly established to include the Lacertilia, Crocodilia, Dinosauria, and other groups

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更新时间：2025-07-15 00:20:37