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We found 26 dictionaries with English definitions that include the word omicron:
Click on the first link on a line below to go directly to a page where "omicron" is defined.

General (22 matching dictionaries)

1. omicron: Merriam-Webster.com [home, info]
2. Omicron, omicron: Oxford Learner's Dictionaries [home, info]
3. omicron: American Heritage Dictionary of the English Language [home, info]
4. omicron: Collins English Dictionary [home, info]
5. omicron: Vocabulary.com [home, info]
6. Omicron, omicron: Wordnik [home, info]
7. omicron: Wiktionary [home, info]
8. omicron: Webster's New World College Dictionary, 4th Ed. [home, info]
9. omicron: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. omicron: Infoplease Dictionary [home, info]
11. Omicron, omicron: Dictionary.com [home, info]
12. omicron: UltraLingua English Dictionary [home, info]
13. Omicron (disambiguation), Omicron (film), Omicron: Wikipedia, the Free Encyclopedia [home, info]
14. omicron: Rhymezone [home, info]
15. omicron: Hutchinson's Dictionary of Difficult Words [home, info]
16. omicron: Free Dictionary [home, info]
17. omicron: Hutchinson Dictionaries [home, info]
18. omicron: Mnemonic Dictionary [home, info]
19. omicron: WordNet 1.7 Vocabulary Helper [home, info]
20. omicron: LookWAYup Translating Dictionary/Thesaurus [home, info]
21. omicron: Dictionary/thesaurus [home, info]
22. omicron: Wikimedia Commons US English Pronunciations [home, info]

Computing (1 matching dictionary)

23. omicron: Dictionary of Algorithms and Data Structures [home, info]

Medicine (1 matching dictionary)

24. Omicron (letter), omicron: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

25. OMICRON: Acronym Finder [home, info]

Slang (1 matching dictionary)

26. Omicron: Urban Dictionary [home, info]

(Note: See omicrons for more definitions.)

Quick definitions from WordNet (omicron) ▸ noun:  the 15th letter of the Greek alphabet ▸ Also see omicrons ▸ Words similar to omicron ▸ Usage examples for omicron ▸ Idioms related to omicron (New!) ▸ Popular adjectives describing omicron ▸ Words that often appear near omicron ▸ Rhymes of omicron ▸ Invented words related to omicron