Zool. [f. ACTINO- + μέρ-ος part.] A portion of the surface of a radiated animal cut off by any two meridional lines reaching from pole to pole. See ACTINAL.
1869. Nicholson, Zool., 111. Eight meridional bands, or ‘ctenophores,’ bearing the comb-like fringes, or characteristic organs of locomotion, traverse at definite intervals the interpolar region, which they divide into an equal number of lune-like lobes, termed the ‘actinomeres.’
