orthosis

(medicine) A device applied to a human limb to control or enhance movement or to prevent bone movement or deformity, for example, a splint or an arch support.

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An external orthopedic appliance that prevents or assists the movement of the spine or limbs.

Pl. orthoses [Gr.] an orthopedic appliance or apparatus used to support, align, prevent or correct deformities or to improve function of movable parts of the body.