WordReference Random House Unabridged Dictionary of American English © 2020
Pa•le•o•zo•ic (pā′lē ə zō′ik or, esp. Brit., pal′ē-),USA pronunciation [Geol.]
- Geologynoting or pertaining to an era occurring between 570 million and 230 million years ago, characterized by the advent of fish, insects, and reptiles. See table under geologic time.
- Geologythe Paleozoic Era or group of systems.
- Greek zōïkós pertaining to animals; see zo-, -ic
- paleo- + -zoic 1830–40
'Paleozoic' also found in these entries: