Definitions

1. noun

A type of sea cucumber or a deep-sea, worm-like marine animal with a long, slender body and a series of tentacles around its mouth.

“The diver observed an ophiuroid crawling across the ocean floor.”

2. noun

Any member of the class Ophiuroidea, which includes the ophiuroids.

“The marine biologist studied the ophiuroid’s unique body structure.”