Breadcrumb Home > Thesaurus > P Synonyms of proterozoic Find synonyms for: Noun 1. Proterozoic, Proterozoic eon, Proterozoic aeon usage: from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms Adjective 1. proterozoic, early (vs. middle) (vs. late) usage: formed in the later of two divisions of the Precambrian era; "proterozoic life forms" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of proterozoic (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: quisling Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language