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EnglishEdit

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EtymologyEdit

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).

PronunciationEdit

NounEdit

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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AdjectiveEdit

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.

Usage notesEdit

In chemical sense, not to be confused with similar-sounding trophic – the words and concepts are unrelated.[1]

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Related termsEdit

ReferencesEdit

  1. ^ Trophic vs. Tropic”, Werner Steinberg, JAMA, May 3, 1952, 149(1), p. 82, doi:10.1001/jama.1952.02930180084027.

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