Definitions

1. adjective

Relating to or characteristic of a family of sea slugs, specifically the order Nudibranchia, commonly known as sea hares, and the family Ancillariidae of sea snails.

“The gordiacea shells were found in the ancient marine deposits.”

2. noun

A type of sea slug or sea snail belonging to the order Nudibranchia or the family Ancillariidae.

“The gordiacea were identified by the marine biologist during the expedition.”