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Radiata

   Also found in: Encyclopedia, Wikipedia 0.02 sec.
Ra`di`a´ta    (rā´dĭ`ā´tå)
n. pl.1.(Zool.) 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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The central and intertropical parts of the Atlantic swarm with Pteropoda, Crustacea, and Radiata, and with their devourers the flying- fish, and again with their devourers the bonitos and albicores; I presume that the numerous lower pelagic animals feed on the Infusoria, which are now known, from the researches of Ehrenberg, to abound in the open ocean: but on what, in the clear blue water, do these Infusoria subsist?
The Voyage of the Beagle by Darwin, Charles View in context
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