Word Study
radiata
CIDE DICTIONARY
radiata, n. pl. [NL., fr. radiatus, p. p. See Radiate.].
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]
" It includes the c" [1913 Webster]
For further exploring for "radiata" in Webster Dictionary Online