retinal

adjective
ret·​i·​nal | \ ˈre-tə-nəl How to pronounce retinal (audio) , ˈret-nəl\

Definition of retinal

 (Entry 1 of 2)

: of, relating to, involving, or being a retina

retinal

noun
ret·​i·​nal | \ ˈre-tə-ˌnal How to pronounce retinal (audio) , -ˌnȯl\

Definition of retinal (Entry 2 of 2)

: a yellowish to orange aldehyde C20H28O derived from vitamin A that in combination with proteins forms the visual pigments of the retinal rods and cones

Examples of retinal in a Sentence

Recent Examples on the Web: Adjective

While intubated and non-responsive, JD was diagnosed with multiple skull fractures, cerebral hemorrhaging, extensive retinal hemorrhaging. Bruce Vielmetti, Milwaukee Journal Sentinel, "Milwaukee man charged in beating death of infant boy while the child was in his mother's arms," 10 June 2019 Throughout my range, there’s Vitamin A in many different forms, from retinal palmitate to retinol. April Long, Town & Country, "Meghan Markle's Facialist Reveals What It Was Like to Treat Her Right Before the Royal Wedding," 15 May 2019 Natural retinoids include retinol, which is converted into retinal (retinaldehyde), which is later converted into retinoic acid. Sarah Jacoby, SELF, "Can People With Sensitive Skin Be in the Retinol Club, Too?," 30 Apr. 2019 So far, studies show NACA can slow retinal degeneration in rodents. Caren Chesler, Popular Mechanics, "A Vision Quest," 6 Mar. 2019 Due to coexisting ocular conditions (corneal or retinal), not all patents may be good candidates for these lenses. WSJ, "See What Cataract Surgery May Also Involve," 28 Nov. 2018 However, a retinal migraine usually only affects one eye while ocular migraines typically impact both. Korin Miller, SELF, "Ocular Migraines Shouldn’t Exist, But They Do, So Here’s What to Know," 7 June 2018 Such research is critical for scientists studying conditions like retinal degeneration, pregnancy loss, development disorders such as Down syndrome and early brain development. Thomas M. Burton, WSJ, "Trump Administration Cancels Research Contract for Fetal Tissue," 25 Sep. 2018 Eventually, prolonged bleeding from damaged retinal blood vessels can cause floating spots in a person’s vision, which may or may not clear up then reappear. Korin Miller, SELF, "This Is How Diabetes Can Affect Your Eyes," 8 Nov. 2018

Recent Examples on the Web: Noun

Using gentle microdermabrasion scrubs, retinals, and other exfoliation-boosting products can help prevent them, as does avoiding using heavy creams and makeup. Amanda Chan, Teen Vogue, "Milia: What They Are, and How to Remove Them," 8 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'retinal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of retinal

Adjective

1798, in the meaning defined above

Noun

1944, in the meaning defined above

History and Etymology for retinal

Noun

retin- + -al entry 3

Keep scrolling for more

Learn More about retinal

Statistics for retinal

Last Updated

14 Jun 2019

Look-up Popularity

Time Traveler for retinal

The first known use of retinal was in 1798

See more words from the same year

Keep scrolling for more

More Definitions for retinal

retinal

adjective
ret·​i·​nal | \ ˈret-ᵊn-əl, ˈret-nəl How to pronounce retinal (audio) \

Medical Definition of retinal

 (Entry 1 of 2)

: of, relating to, involving, or being a retina a retinal examination retinal rods

retinal

noun
ret·​i·​nal | \ ˈret-ᵊn-ˌal How to pronounce retinal (audio) , -ˌȯl How to pronounce retinal (audio) \

Medical Definition of retinal (Entry 2 of 2)

: a yellowish to orange aldehyde C20H28O derived from vitamin A that in combination with proteins forms the visual pigments of the retinal rods and cones

called also retinene, retinene1, vitamin A aldehyde

More from Merriam-Webster on retinal

Rhyming Dictionary: Words that rhyme with retinal

Britannica.com: Encyclopedia article about retinal

Comments on retinal

What made you want to look up retinal? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to take the place or position of

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!