- the innermost coat of the posterior part of the eyeball that receives the image produced by the lens, is continuous with the optic nerve, and consists of several layers, one of which contains the rods and cones that are sensitive to light.
- Retina, a brand name used by Apple, Inc., to describe display screens having a resolution so high that it is difficult to see individual pixels with the human eye: a Retina display; Retina technology; Retina quality.
Origin of retina
- a brand of tretinoin, used especially to reduce wrinkles caused by overexposure to the sun.
Origin of Retin-A
Examples from the Web for retina
The updated iPad Mini, which will start at $399 ($599 for cell), gets a retina display as well as better performance.Apple Launches New iPads in Effort to Boost Sales
October 22, 2013
The reality of the Retina MacBook is a study in compromises.5 Reasons I Hate My New MacBook Pro: A Geek’s Critique
June 15, 2012
It is a building block of protein and found in large amounts in the brain, retina, heart, and blood platelets.Was Demi Moore Really Addicted to Red Bull?
February 1, 2012
What is possibly lovable about the cornea—or the iris or the retina for that matter?Found: Rand Paul's Secret Papers
June 21, 2010
But on Kingozi's retina remained the vision of her as she was.The Leopard Woman
Stewart Edward White
The focus is formed for the first time on the retina itself.Common Science
Carleton W. Washburne
Retina: that portion of the eye upon which the image is formed.Explanation of Terms Used in Entomology
John. B. Smith
The image on his retina is not the image of his consciousness.Fantasia of the Unconscious
D. H. Lawrence
But if light be produced by an agitation of the retina, what is it that produces the agitation?Fragments of science, V. 1-2
- the light-sensitive membrane forming the inner lining of the posterior wall of the eyeball, composed largely of a specialized terminal expansion of the optic nerve. Images focused here by the lens of the eye are transmitted to the brain as nerve impulses
Word Origin and History for retina
late 14c., from Medieval Latin retina "the retina," probably from Vulgar Latin (tunica) *retina, literally "net-like tunic," on resemblance to the network of blood vessels at the back of the eye, and ultimately from Latin rete "net" (see reticulate (adj.)). The Vulgar Latin phrase might be Gerard of Cremona's 12c. translation of Arabic (tabaqa) shabakiyyah "netlike (layer)," itself probably a translation of Greek amphiblestroeides (khiton).
- The delicate multilayered light-sensitive membrane lining the inner posterior chamber of the eyeball containing the rods and cones and connected by the optic nerve to the brain.
- The light-sensitive membrane that lines the inside of the back of the eyeball and connects to the brain by the optic nerve. The retina of vertebrate animals contains rods and cones, specialized cells that absorb light.