Definitions

1. noun

Any of various small, usually marine, crustaceans of the subclass Copepoda, especially the order Harpacticoida, or the order Monstrilloida.

“The acanthopods in the aquarium were fascinating to watch.”

2. noun

A small, usually marine, crustacean of the subclass Copepoda.

“The tiny acanthopod was barely visible to the naked eye.”