echinacean

English

Noun

echinacean (plural echinaceans)

1. Any sea urchin of the superorder Echinacea.
   • 1996, Carroll Lane Fenton, The Fossil Book: A Record of Prehistoric Life, page 322:

     The echinaceans range from Late Triassic to present-day and are all regular echinoids, with more complex structures than occur in the diademataceans.