anaptychus
Meanings
noun
- 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.
Word forms
Etymology
From New Latin anaptychus, from Ancient Greek ἀνάπτυχος (anáptukhos, “unfolding”), from ἀναπτύσσω (anaptússō, “to unfold”).
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