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One of the plates from which the arms of a crinoid arise.

One of the plates from which the arms of a crinoid arise.

Scapular.

Scapular.

The shoulder-blade; a large triangular flattened bone lying over the ribs posteriorly on either side, articulating by its outer angle with the clavicle and the humerus.

Large bone at posterior portion of shoulder; shoulder-blade.

The shoulder-blade ; name given to various structures suggestive of a shoulder-blade, as tegula, patagium, mesothoracic pleuron, fore-leg trochanter of certain Insects ; in Crinoids, the proximal plate of a ray that has an articular facet for the arms.

An irregular, broad, flat bone, of a triangular shape, situate at the posterior part of the shoulder. It has, 1. A posterior or dorsal surface or Dorsum, Testu'do scapu'lae, divided transversely into two parts, by a triangular process, called Spine of the Scapula; which terminates by a considerable eminence, called Acromion. Above the spine, is the Fossa supra-spinata; below it, the F. infra-spinata. 2. An anterior or costal surface or venter, forming the Fossa subscapularis. 3. A superior or cervical edge, which is thin, and terminates, anteriorly, by a strong, curved apophysis, called the coracoid process. 4. A posterior or vertebral edge, called, also, the base. 5. An outer or axillary or inferior edge, having a thick, truncated angle, in which is the glenoid cavity. With this is articulated the head of the humerus. The glenoid cavity is separated from the body of the bone by a narrow part called the cervix or neck. The edges or margins are, also, called costae. The scapula has three angles-an inferior, superior, and anterior.

The shoulder; flat triangular bone behind the shoulder.

A flat bone, irregularly triangular, with its apex directed downward on the posterior surface of the thorax, covering the space between the second and seventh ribs.

n. [Latin.] The shoulder-blade.