Round and long; denoting certain muscles and ligaments. See t. minor (muscle), t. major (muscle), round ligament of uterus, round ligament of liver, pronator t. (muscle). [L. round, smooth, fr. tero, to rub]
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n.
either of two muscles of the shoulder, extending from the scapula to the humerus. The teres major draws the arm towards the body and rotates it inwards; the teres minor rotates the arm outwards.
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te·res (teґrēz) [L.] long and round, as a muscle or ligament.Medical dictionary. 2011.