Jump to: General, Art, Business, Computing, Medicine, Miscellaneous, Religion, Science, Slang, Sports, Tech, Phrases 

We found 8 dictionaries with English definitions that include the word proterozoic aeon: Click on the first link on a line below to go directly to a page where "proterozoic aeon" is defined. General (7 matching dictionaries) Proterozoic aeon: Vocabulary.com [home, info] proterozoic aeon: Dictionary.com [home, info] Proterozoic aeon: Rhymezone [home, info] proterozoic aeon: Free Dictionary [home, info] proterozoic aeon: Mnemonic Dictionary [home, info] proterozoic aeon: LookWAYup Translating Dictionary/Thesaurus [home, info] Proterozoic aeon: Dictionary/thesaurus [home, info] Computing (1 matching dictionary) Proterozoic aeon: Encyclopedia [home, info]

Quick definitions from WordNet (Proterozoic aeon) ▸ noun:  from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms