Retiform

(ret'-if-orm). Net-shaped; reticular. R. Tissue, adenoid tissue.

Retina iret'-in-ah) [rete]. The delicate mem- brane of the eye representing the terminal expansion of the optic nerve, and extending from the point of entrance of the nerve for- ward to its termination in the ora serrata. It consists of the following layers, named from behind forward: (a) the pigment-layer; (b) the neuroepithelial layer, comprising the layer of rods and cones(Jacob's membrane; bacillary layer), the outer limiting membrane, and the outer nuclear layer; (c) the cerebral layer, comprising the outer reticular layei (outer granular layer), the inner nuclear layer, the inner reticular layer (inner granular layer), the ganglion-cell layer, the nerve-fiber layer. These layers are cemented together by a sup- porting framework of connective tissue, the fibers of Miiller, or radiating fibers.

Retinaculum iret-in-ak' -u-lum) [L., "a band"]. A band or membrane holding back an organ or part. R. ligamenti arcuati, the short external lateral ligament of the knee-joint. R. morgagni, R. of the Ileocecal Valve, the ridge formed by the coming together of the valve-segments at each end of the opening between the cecum and the ileum. R. pero- neorum inferius, a fibrous band running over the peroneal tendons as they pass through the grooves on the outer side of the calcaneum. R. peroneorum superius, the external annular ligament of the ankle-joint. R. tendineum, the annular ligament of the wrist or ankle.

Retinal iret'-in-aV) [retina]. Pertaining to or affecting the retina. R. Apoplexy, hemor- rhage into the retina.

 

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