| 释义 |
di·met·ro·don
\dīˈme.trəˌdän\ noun
Usage: capitalized
Etymology: New Latin, from di- + metr- (from Greek metron measure) + -odon
: a genus of No. American Lower Permian synapsid reptiles comprising terrestrial carnivores of moderate size distinguished by a curious crest or dorsal sail supported by greatly elongated neural spines of the vertebrae |