ker·​a·​to·​sis | \ ˌker-ə-ˈtō-səs How to pronounce keratosis (audio) \
plural keratoses\ ˌker-​ə-​ˈtō-​ˌsēz How to pronounce keratosis (audio) \

Definition of keratosis

: an area of skin marked by overgrowth of horny tissue

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Other Words from keratosis

keratotic \ ˌker-​ə-​ˈtä-​tik How to pronounce keratosis (audio) \ adjective

Examples of keratosis in a Sentence

Recent Examples on the Web Now, the little dots on your legs can also be keratosis pilaris (KP), but there is a way to distinguish this condition from some regular dark follicles. Jihan Forbes, Allure, 24 May 2021 While this is the first mask to be released under the SLMD label, the brand does have a full range of products, many targeted towards fighting breakouts and other common conditions like hyperpigmentation and keratosis pilaris. Sarah Midkiff,, 25 Feb. 2021 So what better time than quarantine to address the tiny sebum filled bumps populating my cheeks and keratosis pilaris along my arms? Talia Gutierrez, Glamour, 1 Jan. 2021 The American Cancer Society also said that UV light can cause premature aging and signs of damage such as wrinkles, leather skin, liver spots, actinic keratosis and solar elastosis. Adrianna Rodriguez, USA TODAY, 4 Aug. 2020 Unlike melanoma which is usually characterized by unusual moles, lumps and markings, actinic keratosis appears as small, dry, scaly or crusty patches of skin, according to the Skin Cancer Foundation. NBC News, 20 Feb. 2020 In this case, a common benign keratosis is being removed with Liquid Nitrogen, in addition to a Fraxel treatment. Chelsey Sanchez, Harper's BAZAAR, 15 Nov. 2019 Those are called keratosis pilaris (KP)—a genetic condition that causes a buildup of keratin in your pores—and sadly, they can’t be cured. Chloe Metzger, Marie Claire, 3 Aug. 2018 Pro tip: focus on your elbows and lower legs to prevent or erase the tiny, pimple-like bumps known as keratosis pilaris. Ashley Weatherford, The Cut, 13 June 2018

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

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First Known Use of keratosis

1888, in the meaning defined above

History and Etymology for keratosis

borrowed from German Keratose, from Greek kerat-, kéras "horn" + German -ose -osis — more at kerato-

Note: The term was promulgated, if not introduced, by the German physician Hermann Lebert (1813-78) in Ueber Keratose, oder die durch Bildung von Hornsubstanz erzeugten Krankheiten und ihre Behandlung, Breslau, 1864.

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Time Traveler for keratosis

Time Traveler

The first known use of keratosis was in 1888

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Statistics for keratosis

Last Updated

7 Jun 2021

Cite this Entry

“Keratosis.” Dictionary, Merriam-Webster, Accessed 25 Jul. 2021.

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More Definitions for keratosis


ker·​a·​to·​sis | \ ˌker-ə-ˈtō-səs How to pronounce keratosis (audio) \
plural keratoses\ -​ˌsēz How to pronounce keratosis (audio) \

Medical Definition of keratosis

1 : a disease of the skin marked by overgrowth of horny tissue
2 : an area of the skin affected with keratosis

Other Words from keratosis

keratotic \ -​ˈtät-​ik How to pronounce keratosis (audio) \ adjective

More from Merriam-Webster on keratosis Encyclopedia article about keratosis


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