say it: pay-lee-uh-ZOH-ik
paleozoic is a noun and adjective meaning "from 544 million to about 230 million years ago". It carries 2 recorded senses.
from 544 million to about 230 million years ago
of or relating to or denoting the Paleozoic era
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for paleozoic come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.