Dictionary
di•met•ro•don
Pronunciation: (dī-me'tru-don"), [key]—
n.
a carnivorous dinosaur, of the genus
Dimetrodon, dominant in North America during the Permian Period, up to 10 ft. (3.1 m) long and usually bearing spinal sails.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.