actinic

adjective
ac·​tin·​ic | \ ak-ˈti-nik How to pronounce actinic (audio) \

Definition of actinic

: of, relating to, resulting from, or exhibiting chemical changes produced by radiant energy especially in the visible and ultraviolet parts of the spectrum actinic light actinic keratosis

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Other Words from actinic

actinically \ ak-​ˈti-​ni-​k(ə-​)lē How to pronounce actinically (audio) \ adverb

Examples of actinic in a Sentence

Recent Examples on the Web 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, "How to heal dry, chapped lips, according to dermatologists," 20 Feb. 2020 That said, Solaraze is a prescription topical medication used to treat actinic keratoses (scaly patches of skin that can be a precursor to skin cancer) containing 3% diclofenac in a 2.5% hyaluronic acid gel. Sarah Jacoby, SELF, "Hyaluronic Acid Benefits: This Ingredient Is a Skin-Care Superstar for Good Reason," 3 Oct. 2019 Rupert Craven undergoes a biopsy of an actinic keratosis in Herfurt’s clinic. Karla Adam, Washington Post, "Britain braces for an exodus of E.U. doctors and nurses feeling hurt by Brexit," 4 Mar. 2018 Another summary concludes that nicotinamide acts in several ways to reduce actinic keratoses (your rough spots) and nonmelanoma skin cancers (Australasian Journal of Dermatology, August 2017). Joe, The Seattle Times, "Can a vitamin really help prevent skin cancer?," 24 Dec. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'actinic.' 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 actinic

1845, in the meaning defined above

History and Etymology for actinic

Greek aktīn-, aktís "ray, beam" + -ic entry 1 — more at actin-

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Time Traveler for actinic

Time Traveler

The first known use of actinic was in 1845

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Cite this Entry

“Actinic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actinic. Accessed 27 May. 2020.

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More Definitions for actinic

actinic

adjective
ac·​tin·​ic | \ ak-ˈtin-ik How to pronounce actinic (audio) \

Medical Definition of actinic

: of, relating to, resulting from, or exhibiting chemical changes produced by radiant energy especially in the visible and ultraviolet parts of the spectrum actinic injury and carcinogenesisJournal of the American Medical Association actinic keratosis

Other Words from actinic

actinically \ -​i-​k(ə-​)lē How to pronounce actinically (audio) \ adverb

Comments on actinic

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