from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various carnivorous pelycosaurs of the genus Dimetrodon of the Permian Period, having long spines on the back that supported a sail-like structure, and powerful jaws with sharp teeth.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
carnivorous synapsid, of the genus Dimetrodon, from the Permianperiod
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun carnivorous dinosaur of the Permian in North America having a crest or dorsal sail
from The American Heritage® Dictionary of the English Language, 4th Edition
Still trying to figure out when I can sneak a dimetrodon into STRANGEWAYS, actually ...
I was under the impression that “therapsid” always referred to a kind of synapsid reptile and was distinct from “pelycosaur” another kind of synapsid think dimetrodon.
Synapsids were pelycosaurs (i.e. dimetrodon) cynodonts, dicynodonts and all living and extinct mammals (a true clade), euryapsids were plesiosaurs and icthyosaurs (now all extinct) and diapsids all other amniotes.
You haven't lived, 'til you've heard a dimetrodon scream.
"Everybody knows the dimetrodon, a sail-backed animal from the Permian," Lucas said.
What was the song played on the Cher montage on Ellen Degenerass when Cher came to the show? in walking with beasts did petrolacasaurus evolve into edaphosaurus and dimetrodon?