tropic
/ˈtɹɒpɪk/ noun, adjective
Forms tropics trop. tropick
- noun (geography) Either of the two parallels of latitude 23°26′ north and south of the equator; the farthest points at which the sun can be directly overhead; the boundaries of the torrid zone or tropics.
- noun (philosophy) The component of tone or rhetoric in a sentence.
- adjective Of, or relating to the tropics; tropical.
- adjective (meteorology, rare) Hot and humid.
- adjective (biochemistry, not comparable) Having the quality of indirectly inducing a biological or chemical change in a system or substrate. “The binding of oxygen to hemoglobin is allosterically regulated by various tropic factors, such as BPG and acidity.”
- adjective Pertaining to, involving, or of the nature of a trope or tropes.
Synonyms
Etymology
From Late Latin tropicus (“of or pertaining to the solstice, as a noun, one of the tropics”), from Ancient Greek τροπικός (tropikós, “of or pertaining to a turn or change; or the solstice; or a trope or figure; tropic; tropical; etc.”), from τροπή (tropḗ, “turn; solstice; trope”).
Webster’s 1913
- adjective Of, pertaining to, or designating, an acid obtained from atropine and certain other alkaloids, as a white crystalline substance slightly soluble in water.
- noun One of the two small circles of the celestial sphere, situated on each side of the equator, at a distance of 23º 28min, and parallel to it, which the sun just reaches at its greatest declination north or south, and from which it turns again toward the equator, the northern circle being called the Tropic of Cancer, and the southern the Tropic of Capricorn, from the names of the two signs at which they touch the ecliptic.
- noun (a) One of the two parallels of terrestrial latitude corresponding to the celestial tropics, and called by the same names. (b) pl.
- adjective Of or pertaining to the tropics; tropical. Tropic bird (Zoöl.), any one of three species of oceanic belonging to the genus Phaëthon, found chiefly in tropical seas. They are mostly white, and have two central tail feathers very long and slender. The yellow-billed tropic bird. Phaëthon flavirostris (called also boatswain), is found on the Atlantic coast of America, and is common at the Bermudas, where it breeds.
Etymology [Atropine + -ic.]
Etymology [F. tropique, L.tropicus of or belonging to a turn, i. e., of the sun, Gr. Trope.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “tropic”, CC BY-SA 4.0. Details