traction
     n 1: the friction between a body and the surface on which it
          moves (as between an automobile tire and the road) [syn:
           {grip}, {adhesive friction}]
     2: (orthopedics) the act of pulling on a bone or limb (as in a
        fracture) to relieve pressure or align parts in a special
        way during healing; "his leg was in traction for several
        days"
Source: WordNet® 2.0