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

The Collaborative International Dictionary of English. 2000.

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