retina(n = noun.body) - the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve;
is a kind of membrane, tissue layer
is a part of eye, oculus, optic
has parts: neuroepithelium, fovea, fovea centralis, parafovea, macula, macula lutea, macular area, yellow spot, visual cell, blind spot, optic disc, optic disk, cone, cone cell, retinal cone, retinal rod, rod, rod cell
Derived form adjective retinal1
The delicate membrane by which the back part of the globe of the eye is lined, and in which the fibers of the optic nerve terminate. See Eye. [1913 Webster]
" The fibers of the optic nerve and the retinal blood vessels spread out upon the front surface of the retina, while the sensory layer (called Jacob's membrane), containing the rods and cones, is on the back side, next the choroid coat." [1913 Webster]
retina, n. (pl. retinas, retinae) a layer at the back of the eyeball sensitive to light, and triggering nerve impulses via the optic nerve to the brain where the visual image is formed.
Derivative:
retinal adj.
Etymology:
ME f. med.L f. L rete net
N vision, sight, optics, eyesight, view, look, espial, glance, ken, coup d'oeil, glimpse, glint, peep, gaze, stare, leer, perlustration, contemplation, conspection, conspectuity, regard, survey, introspection, reconnaissance, speculation, watch, espionage, espionnage, autopsy, ocular inspection, ocular demonstration, sight-seeing, point of view, gazebo, loophole, belvedere, watchtower, field of view, theater, amphitheater, arena, vista, horizon, commanding view, bird's eye view, periscope, visual organ, organ of vision, eye, naked eye, unassisted eye, retina, pupil, iris, cornea, white, optics, orbs, saucer eyes, goggle eyes, gooseberry eyes, short sight, clear sight, sharp sight, quick sight, eagle sight, piercing sight, penetrating sight, clear glance, sharp glance, quick glance, eagle glance, piercing glance, penetrating glance, clear eye, sharp eye, quick eye, eagle eye, piercing eye, penetrating eye, perspicacity, discernment, catopsis, eagle, hawk, cat, lynx, Argus, evil eye, basilisk, cockatrice, seeing, visual, ocular, optic, optical, ophthalmic, clear-eyesighted, eagle-eyed, hawk-eyed, lynx-eyed, keen- eyed, Argus-eyed, visible, visibly, in sight of, with one's eyes open at sight, at first sight, at a glance, at the first blush, prima facie, Int, look!, the scales falling from one's eyes, an eye like Mars to threaten or command, her eyes are homes of silent prayer, looking before and after, thy rapt soul sitting in thine eyes.
central artery of the retina, central vein of retina, detached retina, detachment of the retina