dinosauria (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.
Feel free to write to us if you have any questions. But before you do so, please take a look on our page with Frequently Asked Questions (FAQ) and even our sitemap to get a full overview of the content on our site.