Medical Dictionary

Echinoidea

noun plural Ech·i·noi·dea \ ˌek-ə-ˈnȯi-dē-ə \

medical Definition of Echinoidea

: a class of motile bottom-dwelling echinoderms comprising the sea urchins and related forms

echinoid

play \ˈek-ə-ˌnȯid\ noun

Seen and Heard

What made you want to look up Echinoidea? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!