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We found 52 dictionaries with English definitions that include the word diurnal:
Click on the first link on a line below to go directly to a page where "diurnal" is defined.

General (32 matching dictionaries)

1. diurnal: Merriam-Webster.com [home, info]
2. diurnal: Oxford Dictionaries [home, info]
3. diurnal: American Heritage Dictionary of the English Language [home, info]
4. diurnal: Collins English Dictionary [home, info]
5. diurnal: Vocabulary.com [home, info]
6. diurnal: Macmillan Dictionary [home, info]
7. Diurnal, diurnal: Wordnik [home, info]
8. diurnal: Cambridge Advanced Learner's Dictionary [home, info]
9. diurnal: Wiktionary [home, info]
10. diurnal: Webster's New World College Dictionary, 4th Ed. [home, info]
11. diurnal: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. diurnal: Infoplease Dictionary [home, info]
13. diurnal: Dictionary.com [home, info]
14. diurnal: Online Etymology Dictionary [home, info]
15. diurnal: UltraLingua English Dictionary [home, info]
16. Diurnal: Wikipedia, the Free Encyclopedia [home, info]
17. Diurnal: Online Plain Text English Dictionary [home, info]
18. diurnal: Webster's Revised Unabridged, 1913 Edition [home, info]
19. diurnal: Rhymezone [home, info]
20. Diurnal: AllWords.com Multi-Lingual Dictionary [home, info]
21. diurnal: Webster's 1828 Dictionary [home, info]
22. diurnal: Hutchinson's Dictionary of Difficult Words [home, info]
23. diurnal: Free Dictionary [home, info]
24. diurnal: Hutchinson Dictionaries [home, info]
25. diurnal: Mnemonic Dictionary [home, info]
26. diurnal: WordNet 1.7 Vocabulary Helper [home, info]
27. diurnal: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. diurnal: Dictionary/thesaurus [home, info]
29. diurnal: Wikimedia Commons US English Pronunciations [home, info]
30. diurnal: Worthless Word For The Day [home, info]

Business (1 matching dictionary)

31. diurnal: Legal dictionary [home, info]

Computing (1 matching dictionary)

32. diurnal: Encyclopedia [home, info]

Medicine (4 matching dictionaries)

33. Diurnal: MedTerms.com Medical Dictionary [home, info]
34. diurnal: online medical dictionary [home, info]
35. diurnal: Medical dictionary [home, info]
36. Diurnal: Drug Medical Dictionary [home, info]

Miscellaneous (2 matching dictionaries)

37. diurnal: A Word A Day [home, info]
38. diurnal: Wordcraft Dictionary [home, info]

Science (7 matching dictionaries)

39. Diurnal: Bird On! [home, info]
40. Diurnal: Solar Radiation Resource Terms [home, info]
41. diurnal: Botanical Terms [home, info]
42. diurnal: Tree of Life Glossary [home, info]
43. Diurnal: Fishkeeping glossary [home, info]
44. diurnal: Anthropology dictionary [home, info]
45. DIURNAL: Weather Glossary [home, info]

Slang (1 matching dictionary)

46. Diurnal: Urban Dictionary [home, info]

Tech (4 matching dictionaries)

47. diurnal: Glossary of Meteorology [home, info]
48. Diurnal: National Weather Service Glossary [home, info]
49. diurnal: SeaTalk Dictionary of English Nautical Language [home, info]
50. Diurnal: Latitude Mexico [home, info]

(Note: See diurnals for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (diurnal) ▸ adjective:  having a daily cycle or occurring every day ("Diurnal rhythms") ▸ adjective:  belonging to or active during the day ("Diurnal animals are active during the day") ▸ Also see diurnals ▸ Word origin ▸ Words similar to diurnal ▸ Usage examples for diurnal ▸ Popular nouns described by diurnal ▸ Words that often appear near diurnal ▸ Rhymes of diurnal ▸ Invented words related to diurnal