Tropic-bird
noun
1.
any of several web-footed seabirds of the family Phaethontidae, chiefly of tropical seas, having white plumage with black markings and a pair of greatly elongated central tail feathers.
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- Tropic-cancer
noun 1. See under tropic (def 1a). noun 1. Geography. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. the tropics, the regions lying between and near […]
- Tropic-of-cancer
noun 1. See under tropic (def 1a). noun 1. Geography. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. the tropics, the regions lying between and near […]
- Tropic-of-capricorn
noun 1. See under tropic (def 1a). noun 1. Geography. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. the tropics, the regions lying between and near […]
- Tropine
noun, Chemistry. 1. a white, crystalline, hygroscopic, water-soluble, poisonous alkaloid, C 8 H 15 NO, obtained chiefly by the hydrolysis of atropine or hyoscyamine. noun 1. a white crystalline poisonous hygroscopic alkaloid obtained by heating atropine or hyoscyamine with barium hydroxide. Formula: C8H15NO tropine tro·pine (trō’pēn’, -pĭn) or tro·pin (-pĭn) n. A white, crystalline, poisonous […]
- Tropism
noun, Biology. 1. an orientation of an organism to an external stimulus, as light, especially by growth rather than by movement. 1. variant of -tropy. noun 1. the response of an organism, esp a plant, to an external stimulus by growth in a direction determined by the stimulus combining form 1. indicating a tendency to […]