mišica

1. upper arm; biceps
   Uhvatio me je čvrsto za mišicu. — He grabbed me firmly by the upper arm.
   Nosio je novine pod mišicom. — He was carrying the newspaper under his arm.
2. colloq. (in plural) muscles; biceps
   Ide u teretanu da napumpa mišice. — He goes to the gym to bulk up his biceps.

Do not confuse with "mišić", a muscle in general.