sub clavi us. 1

A groove on the first rib in which the subclavian artery rests, close to the tubercle for the insertion of the scalenus antic us. 2: A furrow on the apex of the lung formed by the subclavian artery. 3. A depre ion in the clavicle into which the sub clavi us muscle is inserted, s. tali. A deep furrow on the lower surface of the astragalus, dividing its articular surface into two portions, s. trans versus o is occipitis. The groove in the occipital bone for the lateral sinus, s. trans versus o is parietal is. A broad flat groove on the inner surface of the postero-inferior angle of the parietal bone for the lateral sinus, s. tympanic us. The groovelike furrow in the bony tympanic ring for the reception of the margin of the tympanic membrane, s. ulnar is humeri. 792 The groove on the posterior surface of the internal condyle of the humerus for the ulnar nerve. sulci vertebrates. The grooves seen on either side of the spinous proce es of the vertebrae when viewed from behind. [Lat.]