cast [ONorse, kasta] , 1. a stiff, solid dressing formed with plaster of paris or other material around a limb or other body part to immobilize it during healing. Kinds include body jacket, long-arm cast, long-leg cast, short-arm cast, short-leg cast, spica cast. 2. a mold of a part or all of a patient’s teeth and internal jaw area for fitting prostheses or dentures. 3. a tiny structure formed by deposits of mineral or other substances on the walls of renal tubules, bronchioles, or other organs. Casts often appear in samples of urine or blood collected for laboratory examination. 4. the deviation of an eye from the normal parallel lines of vision, such as in strabismus.
