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The Collaborative International Dictionary
Angle of traction

Traction \Trac"tion\, n. [L. trahere, tractum, to draw: cf. F. traction.]

  1. The act of drawing, or the state of being drawn; as, the traction of a muscle.

  2. Specifically, the act of drawing a body along a plane by motive power, as the drawing of a carriage by men or horses, the towing of a boat by a tug.

  3. Attraction; a drawing toward. [R.]

  4. The adhesive friction of a wheel on a rail, a rope on a pulley, or the like; as, the car is stuck in the snow because it can;t get any traction.
    --Knight.

    Angle of traction (Mech.), the angle made with a given plane by the line of direction in which a tractive force acts.

    Traction engine, a locomotive for drawing vehicles on highways or in the fields.