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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Radiata \Ra'di*a"ta\ (r[=a]"d[i^]*[=a]"t[.a]), noun pl. [NL., fr. radiatus, p. p. See {Radiate}.] (Zo["o]l.) An extensive artificial group of invertebrates, having all the parts arranged radially around the vertical axis of the body, and the various organs repeated symmetrically in each ray or spheromere.
Note: It includes the c[oe]lenterates and the echinoderms. Formerly, the group was supposed to be a natural one, and was considered one of the grand divisions of the animal kingdom.
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