Paleechinoidea

1 definition found

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

  Paleechinoidea \Pa`le*["e]ch`i*noi"de*a\, n. pl. [NL. See
     {Paleo-}, and {Echinoidea}.] (Zool.)
     An extinct order of sea urchins found in the Paleozoic rocks.
     They had more than twenty vertical rows of plates. Called
     also {Palaeechini}. [Written also {Palaeechinoidea}.]
     [1913 Webster]