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asterioidea |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Asterioidea \As*te`ri*oid"e*a\, Asteridea \As`ter*id"e*a\, n. pl [NL., fr Gr 'asteri`as + -oid. See {Asterias}.] (Zo["o]l.) A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is star-shaped or pentagonal.