Lexic.us

Definition of Retinal

1. Adjective. In or relating to the retina of the eye. "Retinal cells"

2. Noun. Either of two yellow to red retinal pigments formed from rhodopsin by the action of light.

Definition of Retinal

1. a. Of or pertaining to the retina.

Definition of Retinal

1. Adjective. Of or pertaining to the retina. ¹

2. Noun. (biochemistry) One of several yellow or red carotenoid pigments formed from rhodopsin by the action of light; retinene ¹

¹ Source: wiktionary.com

Definition of Retinal

1. retinene [n -S] - See also: retinene

Medical Definition of Retinal

1. 1. Pertaining to the retina. 2. The aldehyde of retinol, derived by the oxidative enzymatic splitting of absorbed dietary carotene and having vitamin A activity. In the retina, retinal combines with opsins to form visual pigments. One isomer, 11 cis retinal combines with opsin in the rods (scotopsin) to form rhodopsin or visual purple. Another, all trans retinal (trans r.), visual yellow, xanthopsin) results from the bleaching of rhodopsin by light, in which the 11 cis form is converted to the all trans form. Retinal also combines with opsins in the cones (photopsins) to form the three pigments responsible for colour vision. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Retinal

retinaculum capsulae articularis coxae retinaculum caudale retinaculum cutis retinaculum extensorum retinaculum flexorum retinaculum musculorum extensorum inferius retinaculum musculorum extensorum superius retinaculum musculorum flexorum retinaculum of articular capsule of hip retinaculum of flexor muscles

retinaculum of skin retinaculum patellae laterale retinaculum patellae mediale retinaculum tendinum retinae retinal (current term) retinal adaptation retinal anlage tumour retinal artery retinal artery occlusion

retinal blood vessels retinal camera retinal degeneration retinal dehydrogenase retinal detachment retinal disease retinal disparity retinal drusen

Literary usage of Retinal

Below you will find example usage of this term as found in modern and/or classical literature:

1. Psychology, General Introduction by Charles Hubbard Judd (1917)
"retinal rivalry. Factors other than those contributed by the two eyes. ... General movements as conditions of fusion of retinal sensations. ..."

2. Psychological Review by American Psychological Association (1896)
"SOME PRELIMINARY EXPERIMENTS ON VISION WITHOUT INVERSION OF THE retinal IMAGE.1 DR. GEORGEM STRATTON. University of California Two important theories of ..."

3. Outlines of Psychology by Wilhelm Max Wundt, Charles Hubbard Judd (1902)
"This distance is about equal to the diameter of a retinal cone, and since the centre of the retina has only cones and these are so close together that they ..."

4. Outlines of Psychology by Wilhelm Max Wundt, Charles Hubbard Judd (1902)
"This distance is about equal to the diameter of a retinal cone, and since the centre of the retina has only cones and these are so close together that they ..."

5. A Text Book of Physiology by Michael Foster (1900)
"In this way the construction of the reduced eye enables us to ascertain the position, magnitude, and features of the retinal image of an object. ..."

6. The Principles of Psychology by William James (1890)
"63, the retinal image of the space between the extreme dots is in all three lines the same, yet it seems much larger the moment it is filled up ..."

7. A Textbook of Physiology by Michael Foster (1891)
"In this way the construction of the reduced eye enables us to ascertain the position, magnitude and features of the retinal image of an object. § 707. ..."

8. Psychology, General Introduction by Charles Hubbard Judd (1917)
"Definite optical relation between the distance and the size of an object and the size of the retinal image from this object. This series of observations ..."

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