for 3. | 1. | Pathology.
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| 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.
|
| 5. | (initial capital letter ) tropic of. See under tropic (def. 1a). |

| 1. | Geography.
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| 2. | Astronomy. either of two circles on the celestial sphere, one lying in the same plane as the tropic of Cancer, the other in the same plane as the tropic of Capricorn. |
| 3. | of, pertaining to, characteristic of, or occurring in the tropics; tropical: romance under the tropic skies of Old Mexico. |

| tropic of Cancer n. The parallel of latitude 23°27' north of the equator, the northern boundary of the Torrid Zone, and the most northerly latitude at which the sun can shine directly overhead. |
cancer can·cer (kān'sər)
n.
Abbr. CA Any of various malignant neoplasms characterized by the proliferation of anaplastic cells that tend to invade surrounding tissue and metastasize to new body sites.
The pathological condition characterized by such growths.
| Cancer
A faint constellation in the Northern Hemisphere near Leo and Gemini. Cancer (the Crab) is the fourth sign of the zodiac. |
tropic (trŏp'ĭk) Pronunciation Key
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| Tropic of Cancer
The parallel of latitude approximately 23°27' north. It forms the boundary between the Torrid and North Temperate zones. |