noun
- marine animals with feathery arms and a stalk, related to starfish and sea urchins; sea lilies
Usage: biology; paleontology
Examples
- Crinoids were abundant in ancient seas millions of years ago.
- The fossil crinoids found in limestone show their distinctive stem segments.
- Modern crinoids still live in deep ocean waters today.
- Students studied crinoids as examples of echinoderms in biology class.
- The museum displayed beautiful specimens of fossilized crinoids.
- Crinoids use their feathery arms to filter food from the water.