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(ˈrɛt n ə, ˈrɛt nə)

n., pl. ret•i•nas, ret•i•nae (ˈrɛt nˌi)
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.
[1350–1400; Middle English ret(h)ina < Medieval Latin rētina, perhaps = Latin rēt-, s. of rēte net + -ina -ine3]


(ˌrɛt nˈeɪ)
a brand of tretinoin, used esp. to reduce wrinkles caused by overexposure to the sun.


n. Retin-A, nombre comercial del ácido retinoico, medicamento usado en el tratamiento de acné.
References in periodicals archive ?
During the first few weeks of therapy with RETIN-A, some irritation, including redness and peeling, will be experienced by most patients.
The FDA first approved Microsponge systems for use in the ethical pharmaceutical product, Ortho-McNeil's Retin-A Micro, in February 1997.
Quinn, who used to work for health-care marketers such as NCI and KPR, has experience working on several dermatological products including MetroGel/MetroCream and Differin, RENOVA, Retin-A and others.
When my patients come in for an assessment, I feel bound to say, 'Look, we can do all these fancy procedures, lasers, and so forth, but if you use Retin-A for 6 months you're going to see a nice improvement, so maybe you should try that first.
M2 EQUITYBITES-January 27, 2016-Perrigo completes acquisition of Retin-A from Matawan Pharmaceuticals
M2 PHARMA-January 27, 2016-Perrigo completes acquisition of Retin-A from Matawan Pharmaceuticals
26 January 2016 - Irish drugmaker Perrigo Co plc (NYSE: PRGO) (TASE: PRGO) has completed the acquisition of a portfolio of generic dosage forms and strengths of Retin-A (tretinoin) from Matawan Pharmaceuticals, LLC, the company said.
Perrigo has announced it will acquire Matawan Pharmaceuticals' range of generic Retin-A products, which are indicated for the treatment of acne vulgaris.
Retinol became well known shortly after Retin-A made headlines as a prescription wrinkle cream back in 1987.
Disclosures: The study was sponsored by Johnson & Johnson, whose Ortho Dermatologics division markets the Retin-A Micro Pump.
Those seeking significant improvement to the appearance of wrinkled skin should consult a dermatologist about using prescription retinoids like Renova, Retin-A or the equivalent generic versions, Hirsh said, contending that nonprescription remedies offer only minor and inconsistent improvements.
BLEACH THE BROWN Consider a product that contains kojic acid, hydroquinone, Retin-A, and a mild steroid cream.