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more about echinoidea
echinoidea |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Echinoidea \Ech`i*noi"de*a\, n. pl [NL. See {Echinus}, and {-oid}.] (Zo["o]l.) The class Echinodermata which includes the sea urchins. They have a calcareous, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See {Spatangoid}, {Clypeastroid}. [Written also {Echinidea}, and {Echinoida}.] From WordNet r 1.6 [wn]: Echinoidea n : sea urchins and sand dollars [syn: {Echinoidea}, {class Echinoidea}]
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