Having or characterized by more than five longitudinal rows of muscle cells. Formerly: specifically †of or designating a nematode worm of the former group Polymyarii (obsolete).
A polymyarian nematode.
Late 19th century; earliest use found in The Century Dictionary. From scientific Latin Polymyarii, former group name (A. SchneiderMonographie der Nematoden 22; from poly- + ancient Greek μῦς muscle + scientific Latin -arii, plural of -arius) + -an.