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We found 62 dictionaries with English definitions that include the word radius:
Click on the first link on a line below to go directly to a page where "radius" is defined.

General (31 matching dictionaries)

1. radius: Merriam-Webster.com [home, info]
2. radius: Oxford Learner's Dictionaries [home, info]
3. radius: American Heritage Dictionary of the English Language [home, info]
4. radius: Collins English Dictionary [home, info]
5. radius: Vocabulary.com [home, info]
6. radius: Macmillan Dictionary [home, info]
7. Radius, radius: Wordnik [home, info]
8. radius: Cambridge Advanced Learner's Dictionary [home, info]
9. Radius, Radius, Radius, Radius, Radius, Radius, Radius, Radius, Radius: InfoVisual Visual Dictionary [home, info]
10. RADIUS, radius: Wiktionary [home, info]
11. radius: Webster's New World College Dictionary, 4th Ed. [home, info]
12. radius: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. radius: Infoplease Dictionary [home, info]
14. radius: Dictionary.com [home, info]
15. radius: Online Etymology Dictionary [home, info]
16. radius: UltraLingua English Dictionary [home, info]
17. radius: Cambridge Dictionary of American English [home, info]
18. RADIUS, Radius (anatomy), Radius (band), Radius (bone), Radius (comics), Radius (computer), Radius (disambiguation), Radius (film), Radius (geometry), Radius (hardware company), Radius (software), Radius (software company), Radius: Wikipedia, the Free Encyclopedia [home, info]
19. Radius: Online Plain Text English Dictionary [home, info]
20. radius: Webster's Revised Unabridged, 1913 Edition [home, info]
21. radius: Rhymezone [home, info]
22. Radius (m), radius: AllWords.com Multi-Lingual Dictionary [home, info]
23. radius: Webster's 1828 Dictionary [home, info]
24. Radius: 1911 edition of the Encyclopedia Britannica [home, info]
25. radius: Free Dictionary [home, info]
26. radius: Mnemonic Dictionary [home, info]
27. radius: WordNet 1.7 Vocabulary Helper [home, info]
28. radius: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. radius: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

30. radius: ArtLex Lexicon of Visual Art Terminology [home, info]

Business (2 matching dictionaries)

31. RADIUS: Electronic Commerce Dictionary [home, info]
32. Radius (geometry), radius: Legal dictionary [home, info]

Computing (6 matching dictionaries)

33. RADIUS: Free On-line Dictionary of Computing [home, info]
34. RADIUS: CCI Computer [home, info]
35. RADIUS: Computer Telephony & Electronics Dictionary and Glossary [home, info]
36. RADIUS: Webopedia [home, info]
37. RADIUS: I T Glossary [home, info]
38. Radius (geometry), radius: Encyclopedia [home, info]

Medicine (8 matching dictionaries)

39. Radius: MedTerms.com Medical Dictionary [home, info]
40. RADIUS, radius: online medical dictionary [home, info]
41. Radius: Anatomy of the Human Body [home, info]
42. RADIUS: Probert Encyclopaedia of Medicine [home, info]
43. Radius: Gray's Anatomy (1918) [home, info]
44. Radius (geometry), radius: Medical dictionary [home, info]
45. Radius: Drug Medical Dictionary [home, info]
46. radius: Hyperdictionary [home, info]

Miscellaneous (2 matching dictionaries)

47. RADIUS: Acronym Finder [home, info]
48. RADIUS: AbbreviationZ [home, info]

Science (8 matching dictionaries)

49. Radius: Bird On! [home, info]
50. Radius: Eric Weisstein's World of Mathematics [home, info]
51. radius: Botanical Terms [home, info]
52. radius: MATH SPOKEN HERE! [home, info]
53. Radius: Extragalactic Astronomy [home, info]
54. radius, radius, radius, radius (of a graph): PlanetMath Encyclopedia [home, info]
55. Radius: Glossary of Entomology [home, info]
56. RADIUS: Zoom Astronomy Glossary [home, info]

Slang (1 matching dictionary)

57. radius: Urban Dictionary [home, info]

Tech (3 matching dictionaries)

58. radius: Webster's New World Telecom Dictionary [home, info]
59. Radius: AUTOMOTIVE TERMS [home, info]
60. Radius: Sweetwater Music [home, info]

(Note: See radiusing for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (radius) ▸ noun:  the length of a line segment between the center and circumference of a circle or sphere ▸ noun:  the outer and slightly shorter of the two bones of the human forearm ▸ noun:  a circular region whose area is indicated by the length of its radius ("They located it within a radius of 2 miles") ▸ noun:  a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere) ▸ noun:  support consisting of a radial member of a wheel joining the hub to the rim ▸ Also see radiusing ▸ Word origin ▸ Words similar to radius ▸ Usage examples for radius ▸ Idioms related to radius (New!) ▸ Popular adjectives describing radius ▸ Words that often appear near radius ▸ Rhymes of radius ▸ Invented words related to radius