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We found 25 dictionaries with English definitions that include the word archaean:
Click on the first link on a line below to go directly to a page where "archaean" is defined.

General (22 matching dictionaries)

1. archaean, Archaean: Oxford Dictionaries [home, info]
2. Archaean: American Heritage Dictionary of the English Language [home, info]
3. Archaean: Dictionary/thesaurus [home, info]
4. archaean: LookWAYup Translating Dictionary/Thesaurus [home, info]
5. archaean: WordNet 1.7 Vocabulary Helper [home, info]
6. archaean: Mnemonic Dictionary [home, info]
7. archaean: Hutchinson Dictionaries [home, info]
8. archaean: Free Dictionary [home, info]
9. archaean: Hutchinson's Dictionary of Difficult Words [home, info]
10. Archaean: AllWords.com Multi-Lingual Dictionary [home, info]
11. archaean: Rhymezone [home, info]
12. Archaean: Online Plain Text English Dictionary [home, info]
13. Archaean: Wikipedia, the Free Encyclopedia [home, info]
14. Archaean: Online Etymology Dictionary [home, info]
15. Archaean: Dictionary.com [home, info]
16. Archaean: Infoplease Dictionary [home, info]
17. Archaean: Webster's New World College Dictionary, 4th Ed. [home, info]
18. archaean, Archaean: Wiktionary [home, info]
19. Archaean: Wordnik [home, info]
20. archaean: Vocabulary.com [home, info]
21. archaean: Collins English Dictionary [home, info]
22. archaean, Archaean: Merriam-Webster.com [home, info]

Computing (1 matching dictionary)

23. archaean, Archaean: Encyclopedia [home, info]

Medicine (1 matching dictionary)

24. archaean: online medical dictionary [home, info]

Science (1 matching dictionary)

25. Archaean: USGS Paleontology Glossary of Terms [home, info]

(Note: See archaeans for more definitions.)

Quick definitions from WordNet (archaean) ▸ adjective:  used of the earliest known rocks ▸ Also see archaeans ▸ Word origin ▸ Words similar to archaean ▸ Usage examples for archaean ▸ Popular nouns described by archaean ▸ Words that often appear near archaean ▸ Rhymes of archaean ▸ Invented words related to archaean