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radiata |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Radiata \Ra`di*a"ta\, n. 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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