the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > member of > parts of > radiating part (2)
radius1698
Zoology. Each of the arms or radial divisions of a starfish or other echinoderm; each of the main axes of symmetry corresponding to these. Also: a…
perradius1880
Each of the primary rays or axes in certain coelenterates and ctenophores.