Breadcrumb Home > Dictionary > Index P Paleozoic: Meaning and Definition of Find definitions for: Pa•le•o•zo•ic Pronunciation: (pā"lē-u-zō'ik or, esp. Brit., pal"ē-), [key] — Geol. Geol. —adj. noting 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 —n. the Paleozoic Era or group of systems. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: paleozoic (Thesaurus) paleotropical paleozoology TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: bildungsroman Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language