tropic

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See also: -tropic

English[edit]

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Etymology[edit]

From Late Latin tropicus (of or pertaining to the solstice, as a noun, one of the tropics), from τροπικός (tropikós, of or pertaining to a turn or change, or the solstice, or a trope or figure, tropic, tropical; etc.), from τροπή (tropē, a turn, turning, solstice, trope); see trope.

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Noun[edit]

tropic (plural tropics)

  1. Either of the two parallels of latitude 23°27′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.

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Adjective[edit]

tropic (comparative more tropic, superlative most tropic)

  1. Of, or relating to the tropics; tropical.
  2. (weather, climate) hot and humid.
  3. (biochemistry) (noncomparative) 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.

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