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early 15c., "a drawing or pulling" (originally the pulling of a dislocated limb to reposition it), from Medieval Latin tractionem (nominative tractio) "a drawing" (mid-13c.), noun of action from past participle stem of Latin trahere "to pull, draw" (see tract (n.1)). Sense of "rolling friction of a vehicle" first appears 1825.
traction trac·tion (trāk'shən)
The act of drawing or pulling.
A pulling force.
A sustained pull applied mechanically, especially to the arm, leg, or neck, to correct fractured or dislocated bones, to overcome muscle spasms, or to relieve pressure.