Asterioidea

Related to Asterioidea: Crinoidea, Echinoidea, Ophiuroidea, Holothuroidea

As`te`ri`oid´e`a


n. pl.1.(Zool.) 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.