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retinal1

[ret-n-uh l] /ˈrɛt n əl/
adjective
1.
of or pertaining to the retina of the eye.
Origin
1830-1840
1830-40; retin(a) + -al1

retinal2

[ret-n-al, -awl] /ˈrɛt nˌæl, -ˌɔl/
noun, Biochemistry
1.
an orange pigment, C 2 0 H 2 8 O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.
Also, retinene
[ret-n-een] /ˈrɛt nˌin/ (Show IPA)
.
Origin
1940-45; retin(a) + -al3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for retinal
  • In vertebrates this protein is found in retinal cells, where it transduces the energy of light into a nerve signal to the brain.
  • Claims the market for a successful retinal prosthesis is significant.
  • Visual pigments are found in specialized retinal cells at the back of the eye.
  • The technique is not suitable for blindness caused by retinal damage.
  • Others want to deliver working copies of broken genes into retinal cells, restoring their function.
  • At some point, they leave this cycle and commit to becoming one of the various types of retinal cells.
  • The drops protected the animals' retinal ganglion cells and optic nerves, both of which are generally damaged by the disease.
  • He extracted retinal tissue from amphibians and exposed the living tissue to a series of simple geometric patterns.
  • The action of a photon on a rhodopsin molecule in a retinal cell has some quantum mechanical interpretations, and so forth.
  • Maps are made by surveyors who record pointer readings, not retinal images.
British Dictionary definitions for retinal

retinene

/ˈrɛtɪˌniːn/
noun
1.
the aldehyde form of the polyene retinol (vitamin A) that associates with the protein opsin to form the visual purple pigment rhodopsin
Word Origin
C20: from retina + -ene
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for retinal
adj.

1838; see retina + -al (1).

Online Etymology Dictionary, © 2010 Douglas Harper
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retinal in Medicine

retinal ret·i·nal (rět'n-āl', -ôl')
n.
See retinaldehyde.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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