( 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.
( 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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012