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


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 When this occurs, the retinal cells separate from the layer of blood vessels that provides oxygen and nourishment. Leah Groth,, "Savannah Guthrie Undergoes Eye Surgery After Serious Injury to Retina," 11 Dec. 2019 Eventually a person may develop high myopia, which in addition to requiring him or her to wear corrective lenses raises the risk later in life of complications such as retinal detachment, premature cataracts, glaucoma and macular degeneration. Shari Rudavsky, Indianapolis Star, "The number of nearsighted kids is soaring — and the reason why may not be what you think," 2 Dec. 2019 Doctors also found 10 facial fractures, retinal bleeding and broken bones in her shoulder and leg, Dracopoulos said. Jason Meisner,, "Chicago woman accused of punching 2-month-old daughter held without bail," 29 Nov. 2019 Cleek was diagnosed four years ago with retinitis pigmentosa, a degenerative retinal disease that leaves her with severely limited vision. oregonlive, "Guide Dogs for the Blind has trained hundreds of dogs in Boring and Gresham (Video)," 26 Nov. 2019 On one end there’s the gentler, over-the-counter retinol and retinal which are available in cosmetic skin-care products like night creams, serums, and moisturizers. Dina Cheney, SELF, "Here's Exactly How and When to Use 5 Basic Skin-Care Staples," 4 Oct. 2019 The type of blindness treated by Luxturna, known as RPE65-associated inherited retinal dystrophy, is even rarer, affecting only 1,000 to 2,000 individuals in the United States. Jeremy Schafer, STAT, "Should employers take a chance on little-known Embarc to pay for gene therapy?," 12 Nov. 2019 Laboratory studies have shown that prolonged exposure to high-intensity blue light damages retinal cells in mice. Phillip Yuhas, Quartz, "Blue light isn’t the main cause of eye fatigue and sleep loss," 8 Nov. 2019 Mason’s retinal bleeding in both eyes, combined with the fractures and the amount of bleeding in his brain, was consistent with abuse, Shanghvi wrote. NBC News, "She called 911 after her baby fell. Weeks later, CPS took her children.," 7 Nov. 2019 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


1798, in the meaning defined above


1944, in the meaning defined above

History and Etymology for retinal


retin- + -al entry 3

Keep scrolling for more

Learn More about retinal

Time Traveler for retinal

Time Traveler

The first known use of retinal was in 1798

See more words from the same year

Statistics for retinal

Last Updated

27 Dec 2019

Cite this Entry

“Retinal.” The Dictionary, Merriam-Webster Inc., Accessed 24 January 2020.

Keep scrolling for more

More Definitions for retinal


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


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 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).


a feeling of well-being or elation

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman tablet
  • What did focus mean in Latin?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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

Love words? Need even more definitions?

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