Tropic Definition

trŏpĭk
noun
Either of two circles of the celestial sphere parallel to the celestial equator, one, the Tropic of Cancer, c. 23° 26 north, and the other, the Tropic of Capricorn, c. 23° 26 south: they are the limits of the apparent north-and-south journey of the sun and are determined by the obliquity of the ecliptic.
Webster's New World
Either of two parallels of latitude (Tropic of Cancer and Tropic of Capricorn) situated on either side of the earth's equator that correspond to the astronomical tropics.
Webster's New World
adjective
Of the tropics; tropical.
Webster's New World
Relating to or exhibiting tropism.
American Heritage Medicine
Synonyms:
suffix
Turning or changing in a specified way or in response to a specified stimulus.
Heliotropic.
American Heritage
Affecting or attracted to something specified.
Psychotropic.
American Heritage
Wiktionary
affix
Turning toward or from, changing because of, or otherwise responding to a (specified kind of) stimulus.
Phototropic.
Webster's New World

Other Word Forms of Tropic

Noun

Singular:
tropic
Plural:
tropics

Origin of Tropic

  • Middle English tropik from Old French tropique from Late Latin tropicus from Latin of a turn from Greek tropikos from tropē a turning trep- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Greek tropē a turning tropic

    From American Heritage Dictionary of the English Language, 5th Edition

  • From –tropic

    From American Heritage Dictionary of the English Language, 5th Edition

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