Radiata

[rey-dee-ey-tuh, -ah-tuh]

Ra·di·a·ta

[rey-dee-ey-tuh, -ah-tuh]
noun Biology.
(in some classification systems) a major grouping that includes more or less radially symmetrical animals, as coelenterates (jellyfish, sea anemones, corals), ctenophores (comb jellies), and echinoderms (starfish, sea urchins, sea cucumbers).

Origin:
1820–30; < Neo-Latin, noun use of neuter plural of Latin radiātus radiate (adj.)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Radiata is always a great word to know.
So is prototroph. Does it mean:
an organism or cell capable of synthesizing all its metabolites from inorganic material, requiring no organic nutrients
a process that results in differential reproduction among a population so that the inheritable traits of only certain individuals are passed on
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