Carpoidea

plural noun

Car·​poi·​dea

kärˈpȯidēə

: a small class (formerly an order of Cystoidea) of widely distributed Paleozoic echinoderms having a movable tail or stalk, a bilaterally compressed body, and no evident traces of radial symmetry

Word History

Etymology

New Latin, from carp- entry 1 + -oidea

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!