-tropic

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.

-tropic

1. (sciences) Turning or changing.
2. (sciences) Affecting or attracted to the thing specified.

   ‎psycho- (“mind”) + ‎-tropic (“altering”) → ‎psychotropic (“mind-altering”)

Frequently confused with -trophic (“growth, development; nutrition”), which is instead from Ancient Greek τροφικός (trophikós, “pertaining to food or nourishment”), from τροφή (trophḗ, “food”).[1] Compare tropic hormone (drives other glands) and trophic hormone (affects growth) and tropo-/tropho-.

• trope, -trope
• tropic
• tropism
• -tropism
• tropo-
• -tropy

• Pictor, protic