Radiata Ra`di*a"ta (r[=a]"d[i^]*[=a]"t[.a]), 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. [1913 Webster]

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. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


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