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We found 23 dictionaries with English definitions that include the word proterozoic:
Click on the first link on a line below to go directly to a page where "proterozoic" is defined.

General (19 matching dictionaries)

1. Proterozoic: Merriam-Webster.com [home, info]
2. Proterozoic, the Proterozoic: Oxford Dictionaries [home, info]
3. Proterozoic: American Heritage Dictionary of the English Language [home, info]
4. Proterozoic: Collins English Dictionary [home, info]
5. Proterozoic, proterozoic: Vocabulary.com [home, info]
6. Proterozoic: Wordnik [home, info]
7. Proterozoic, proterozoic: Wiktionary [home, info]
8. Proterozoic: Webster's New World College Dictionary, 4th Ed. [home, info]
9. Proterozoic: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. Proterozoic: Infoplease Dictionary [home, info]
11. Proterozoic: Dictionary.com [home, info]
12. Proterozoic, proterozoic: UltraLingua English Dictionary [home, info]
13. Proterozoic: Wikipedia, the Free Encyclopedia [home, info]
14. Proterozoic: Rhymezone [home, info]
15. proterozoic: Free Dictionary [home, info]
16. proterozoic: Mnemonic Dictionary [home, info]
17. proterozoic: WordNet 1.7 Vocabulary Helper [home, info]
18. Proterozoic, proterozoic: LookWAYup Translating Dictionary/Thesaurus [home, info]
19. Proterozoic: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

20. Proterozoic: Encyclopedia [home, info]

Science (3 matching dictionaries)

21. Proterozoic: USGS Paleontology Glossary of Terms [home, info]
22. Proterozoic: Geography Dictionary [home, info]

(Note: See proterozoics for more definitions.)

Quick definitions from WordNet (Proterozoic) ▸ noun:  from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms ▸ adjective:  formed in the later of two divisions of the Precambrian era ("Proterozoic life forms") ▸ Also see proterozoics ▸ Words similar to proterozoic ▸ Usage examples for proterozoic ▸ Popular adjectives describing proterozoic ▸ Popular nouns described by proterozoic ▸ Words that often appear near proterozoic ▸ Rhymes of proterozoic ▸ Invented words related to proterozoic