definitions
  • synonyms

retinal

1
[ ret-n-uh l ]
/ ˈrɛt n əl /
|

adjective

of or relating to the retina of the eye.

Nearby words

retinaculum of fibular muscles, retinaculum of flexor muscles, retinaculum of peroneal muscles, retinaculum of skin, retinaculum tendinum, retinal, retinal adaptation, retinal cone, retinal detachment, retinal isomerase, retinal rivalry

Origin of retinal

1
First recorded in 1830–40; retin(a) + -al1

Definition for retinal (2 of 2)

retinal

2
[ ret-n-al, -awl ]
/ ˈrɛt nˌæl, -ˌɔl /

noun Biochemistry.

an orange pigment, C20H28O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.
Also ret·i·nene [ret-n-een] /ˈrɛt nˌin/.

Origin of retinal

2
First recorded in 1940–45; retin(a) + -al3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for retinal

Word Origin and History for retinal

retinal

adj.

1838; see retina + -al (1).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for retinal

retinal

[ rĕt′n-ăl′, -ôl′ ]

n.

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