1. either of two flat muscles that extend from the upper vertebrae to the base of the skull and serve to rotate or flex or extend the head and neck; [syn: splenius, splenius muscle]
WordNet (r) 3.0 (2006):
splenius muscle
n 1: either of two flat muscles that extend from the upper
vertebrae to the base of the skull and serve to rotate or
flex or extend the head and neck [syn: splenius,
splenius muscle]