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We found 56 dictionaries with English definitions that include the word tumor:
Click on the first link on a line below to go directly to a page where "tumor" is defined.

General (30 matching dictionaries)

1. tumor: Merriam-Webster.com [home, info]
2. tumor: Oxford Learner's Dictionaries [home, info]
3. tumor: American Heritage Dictionary of the English Language [home, info]
4. tumor: Collins English Dictionary [home, info]
5. tumor: Vocabulary.com [home, info]
6. tumor: Macmillan Dictionary [home, info]
7. Tumor, tumor: Wordnik [home, info]
8. tumor: Cambridge Advanced Learner's Dictionary [home, info]
9. tumor: Wiktionary [home, info]
10. tumor: Webster's New World College Dictionary, 4th Ed. [home, info]
11. tumor: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. tumor: Infoplease Dictionary [home, info]
13. tumor: Dictionary.com [home, info]
14. tumor: Online Etymology Dictionary [home, info]
15. tumor: UltraLingua English Dictionary [home, info]
16. tumor: Cambridge Dictionary of American English [home, info]
17. The Tumor, Tumor (comics), Tumor: Wikipedia, the Free Encyclopedia [home, info]
18. Tumor: Online Plain Text English Dictionary [home, info]
19. tumor: Webster's Revised Unabridged, 1913 Edition [home, info]
20. tumor: Rhymezone [home, info]
21. Tumor (m), tumor, tumor, tumor (de): AllWords.com Multi-Lingual Dictionary [home, info]
22. tumor: Webster's 1828 Dictionary [home, info]
23. Tumor: Encarta® Online Encyclopedia, North American Edition [home, info]
24. tumor: Free Dictionary [home, info]
25. tumor: Mnemonic Dictionary [home, info]
26. tumor: WordNet 1.7 Vocabulary Helper [home, info]
27. tumor: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. tumor: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

29. tumor: Encyclopedia [home, info]

Medicine (21 matching dictionaries)

30. Tumor: MedTerms.com Medical Dictionary [home, info]
31. tumor: ABTA Brain Tumor Patients [home, info]
32. tumor: Breast Cancer Talking Dictionary [home, info]
33. tumor: Chronic Fatigue Syndrome Glossary [home, info]
34. Tumor: Merck Manuals [home, info]
35. tumor: Chronic Fatigue Syndrome [home, info]
36. Tumor: Cancer Glossary [home, info]
37. Tumor: Health and Wellness Dictionary [home, info]
38. Tumor: Hepatitis C Information Central [home, info]
39. tumor: Prostate Cancer Interactive Glossary [home, info]
40. Tumor: Glossary of Lymphoma Terms [home, info]
41. Tumor: Breast Cancer Glossary of Medical Terms [home, info]
42. Tumor: MEDLINE plus Illustrated Medical Encyclopedia [home, info]
43. tumor: Dictionary of Cancer Terms [home, info]
44. tumor: Glossary of HIV/AIDS Related Terms [home, info]
45. Tumor: Skin Cancer Information [home, info]
46. tumor: Medical dictionary [home, info]
47. Tumor: University of Maryland Glossary of Medical Terms [home, info]
48. tumor: Vitamin Glossary [home, info]
49. Tumor: Drug Medical Dictionary [home, info]
50. tumor: Hyperdictionary [home, info]

Science (1 matching dictionary)

51. Tumor: Drug Discovery and Development [home, info]

Slang (1 matching dictionary)

52. tumor, the tumor: Urban Dictionary [home, info]

Tech (2 matching dictionaries)

53. Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (tumor) ▸ noun:  an abnormal new mass of tissue that serves no purpose ▸ Also see tumors ▸ Word origin ▸ Words similar to tumor ▸ Usage examples for tumor ▸ Idioms related to tumor (New!) ▸ Popular adjectives describing tumor ▸ Words that often appear near tumor ▸ Rhymes of tumor ▸ Invented words related to tumor