SINCE 1828
pelycosaur
noun
pel·y·co·saur
| \ ˈpe-li-kə-ˌsȯr
\
\
Definition of pelycosaur
: any of an order (Pelycosauria) of extinct, primitive, synapsid vertebrates (such as dimetrodonchiefly of the Permian period often having extreme development of the dorsal vertebral processes and giving rise to the therapsids
Keep scrolling for more
Comments on pelycosaur
What made you want to look up pelycosaur? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Original Meanings Quiz
-
- Which of the following is the earliest known sense of the word awe?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZ
Share pelycosaur
Resources for pelycosaur