Find the word definition

The Collaborative International Dictionary
Blastoidea

Blastoidea \Blas*toid"e*a\, n. pl. [NL., fr. Gr. blasto`s sprout + -oid.] (Zo["o]l.) One of the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so named on account of their budlike form.