Related to Asterioidea: Crinoidea, Echinoidea, Ophiuroidea, Holothuroidea


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.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Genetic consequences of long larval life in the starfish Linckia laevigata (Echinodermata: Asterioidea) on the Great Barrier reef.