Blastoidea

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Blastoidea \Blas*toid"e*a\, n. pl. [NL., fr. Gr. blasto`s sprout
     + -oid.] (Zool.)
     One of the divisions of Crinoidea found fossil in paleozoic
     rocks; pentremites. They are so named on account of their
     budlike form.
     [1913 Webster]