dinosauria
📖 中文释义
- [医]恐龙类
📘 English Definition（英文释义）
- 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.