Etymology

-tropin

Today it means: Hormone. Full definition →

Ancient Greek τροπῐκός (tropĭkós) ← Proto-Indo-European *trep-
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The story

  1. Proto-Indo-European*trep-
  2. Ancient Greekτρέπω (trépō)
  3. Ancient Greekτροπή (tropḗ)
  4. Ancient Greekτροπῐκός (tropĭkós)
  5. English today-tropin

From -tropic (“attracted to or acting upon”) + -in.

Etymology from Wiktionary, CC BY-SA 4.0.