Borrowed 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”). Compare trope and tropic.
Frequently confused with -trophic (“growth, development; nutrition”), which is instead from Ancient Greek τροφικός (trophikós, “pertaining to food or nourishment”), from τροφή (trophḗ, “food”). Compare tropic hormone (drives other glands) and trophic hormone (affects growth) and tropo-/tropho-.
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