Radiata is a taxonomic rank that has been used to classify radially symmetric animals. The term Radiata has united several different groupings of animals, none of which form a monophyletic group under current views of animal phylogeny. Because of this and problems of homoplasy associated with using body symmetry as a phylogenetic character, the te...
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http://en.wikipedia.org/wiki/Radiata
• (n. pl.) 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.
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http://thinkexist.com/dictionary/meaning/radiata/
(from the article `animal`) The two coelenterate phyla (Cnidaria and Ctenophora) advanced in complexity beyond the parazoans by developing incipient tissues—groups of cells that ...
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http://www.britannica.com/eb/a-z/r/3
<zoology> 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. ... It includes the coelenterates and the echinoderms. Formerly, the group was supposed to be a natural one, and was considered one of t...
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http://www.encyclo.co.uk/local/20973
Ra`di·a'ta (-ā'tȧ)
noun plural [ New Latin , from
radiatus , past participle See
Radiate .]
(Zoology) An extensive artificial group of invertebrates, having all the parts arranged radially around the vertical axis of the body, and the various organs repeated sym...
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http://www.encyclo.co.uk/webster/R/3
Radiata is an extensive artificial group of invertebrates. The members are distinguished by having all the parts arranged radially round the vertical axis of the body, and the various organs repeated symmetrically in each ray or spheromere.
Found on
http://www.probertencyclopaedia.com/browse/BR.HTM
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