retinal

1
[ ret-n-uh l ]
/ ˈrɛt n əl /

adjective

of or relating to the retina of the eye.

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compact
joined or packed together; closely and firmly united; dense; solid.
ready or inclined to fight.
not participating actively.
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Origin of retinal

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

Words nearby retinal

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

Definition for retinal (2 of 2)

retinal2
[ 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. 2020

Example sentences from the Web for retinal

Medical 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.