Paleechinoidea
Pronunciation : Pa`le*?ch`i*noi"de*a
Part of Speech : n.
Etymology : [NL. See Paleo-, and Echinoidea.] (Zo?l.)
Definition : Defn: An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also Pal?echini. [Written also Pal?echinoidea.]
pl.
Source : Webster's Unabridged Dictionary, 1913