noun
Etymology: Middle English, from Latin (genitive Cancri), literally, crab; akin to Greek karkinos crab, cancer
Date: 14th century
1. capitalized a northern zodiacal constellation between Gemini and Leo, b. the fourth sign of the zodiac in astrology, one born under the sign of Cancer,
2. \Latin, crab, cancer] a malignant tumor of potentially unlimited growth that expands locally by invasion and systemically by metastasis, an abnormal bodily state marked by such tumors, something evil or malignant that spreads destructively ,
4. an enlarged tumorlike plant growth (as that of crown gall), a plant disease marked by such growths, cancerous adjective cancerously adverb