Etymology

anaptychus

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Today it means: One of a pair of shelly plates found in some cephalopods, such as the ammonites. They are now considered to have been parts of the jaw. Full definition →

New Latin anaptychus ← Ancient Greek ἀνάπτυχος
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The story

  1. Ancient Greek · derived fromἀνάπτυχος“unfolding”
  2. New Latin · borrowed fromanaptychus
  3. English todayanaptychus

From New Latin anaptychus, from Ancient Greek ἀνάπτυχος (anáptukhos, “unfolding”), from ἀναπτύσσω (anaptússō, “to unfold”).

Etymology from Wiktionary, CC BY-SA 4.0.