anaptychus

English

Etymology

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

Noun

anaptychus (plural anaptychi)

1. (paleontology) One of a pair of shelly plates found in some cephalopods, such as the ammonites.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “anaptychus”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)