1) Muscle of the torso 2) Serratus muscles 3) Skeletal muscle 4) Striated muscle 
Serratus means a muscle in the trunk (thorax). ...
Serratus: One of several muscles of the back and thorax. that have interdigitating slips that ressemble the notches on the cutting edge of a saw. (Serrated refers to a finely notched edge.) See also: Serratus anterior; Serratus magnus; Serratus posterior inferior; Serratus posterior superior.
[n] - any of several muscles of the trunk
serratus, saw-toothed.
serratus muscles noun any of several muscles of the trunk
adjective, Latin = notched like the edge of a saw (serrate).