Cancer: The Definition Found On Dictionary.com

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can·cer /ˈkænsər/ Pronunciation Key - Show Spelled Pronunciation[kan-ser] Pronunciation Key - Show IPA Pronunciation
–noun, genitive Can·cri /ˈkæŋkri/ Pronunciation Key - Show Spelled Pronunciation[kang-kree] Pronunciation Key - Show IPA Pronunciation for 3. 1. Pathology. a. a malignant and invasive growth or tumor, esp. one originating in epithelium, tending to recur after excision and to metastasize to other sites.
b. any disease characterized by such growths.

2. any evil condition or thing that spreads destructively; blight.
3. (initial capital letter) Astronomy. the Crab, a zodiacal constellation between Gemini and Leo.
4. (initial capital letter) Astrology. a. the fourth sign of the zodiac: the cardinal water sign.
b. a person born under this sign, usually between June 21 and July 22.

5. (initial capital letter) tropic of. See under tropic (def. 1a).