noun, plural retinas, retinae
[ret-n-ee] /ˈrɛt nˌi/ (Show IPA). Anatomy.
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.
a brand of tretinoin, used especially to reduce wrinkles caused by overexposure to the sun.
noun (pl) -nas, -nae (-ˌniː)
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
retina ret·i·na (rět’n-ə)
n. pl. ret·i·nas or ret·i·nae (rět’n-ē’)
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.
Plural retinas or retinae (rět’n-ē’)
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.
The inner layer of the eye, sensitive to light, that is connected to the brain by the optic nerve. The retina lines the rear of the eye-ball. The lens of the eye focuses waves of light on the retina.
Pharmacology, Trademark. 1. a brand of tretinoin, used especially to reduce wrinkles caused by overexposure to the sun.
noun, plural retinacula [ret-n-ak-yuh-luh] /ˌrɛt nˈæk yə lə/ (Show IPA) 1. Anatomy, Zoology. any of various small structures that hook, clasp, or bind other structures to move them or hold them in place. 2. Entomology. a bristle on the butterfly forewing that clasps to the frenulum of the hindwing. noun (pl) -la (-lə) 1. connection […]
- Retinaculum of fibular muscles
retinaculum of fibular muscles n. See retinaculum of peroneal muscles.
- Retinaculum of flexor muscles
retinaculum of flexor muscles n. A wide band that passes from the medial malleolus to the calcaneus and to the plantar surface as far as the navicular bone and holds in place the tendons of the posterior tibial muscle, the long flexor muscle of the toes, and the long flexor muscle of the big toe.