What does "pelycosaur" mean?

Any of a group of basal or primitive Late Paleozoic synapsid amniotes, part of a polyphyletic grade, formerly regarded as order Pelycosauria.

What is a synonym for "pelycosaur"?

Common synonyms include: animal, dinosaur, mammoth.

noun

noun ·Rare ·Advanced level

Noun

1
Any of a group of basal or primitive Late Paleozoic synapsid amniotes, part of a polyphyletic grade, formerly regarded as order Pelycosauria.
2
large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America wordnet

Ancient Greek πέλυξ (pélux, “bowl, axe”) and σαῦρος (saûros, “lizard”).