: a chronic inflammatory skin disorder typically involving the nose, forehead, and chin that is characterized especially by redness, flushing, telangiectasia, inflamed lesions, and burning sensation, and sometimes by eye dryness and irritation and thickening of tissues especially of the nose

called also acne rosacea

Examples of rosacea in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Nearly 30% of patients developed acne or experienced acne exacerbations, while 12% had rosacea flares or rosacea-like dermatitis. — Korin Miller, Allure, 7 Oct. 2026 This is just one instance where decades of investment and collaboration to fight a disease that affects the global poor had yielded an unexpected benefit – a treatment for eyelid inflammation, dry eyes and rosacea. — Joshua R. Ehrlich, The Conversation, 1 Oct. 2026 So can allergies and skin conditions like rosacea and eczema. — Maria Godoy, NPR, 4 Sep. 2026 The product immediately calmed down my irritable, rosacea-prone skin while delivering intense hydration that lasted all day. — Gina Vaynshteyn, StyleCaster, 31 Aug. 2026 See All Example Sentences for rosacea

Word History

Etymology

short for New Latin acne rosacea "rose-colored acne"

First Known Use

1843, in the meaning defined above

Time Traveler
The first known use of rosacea was in 1843

Browse Nearby Words

Cite this Entry

“Rosacea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rosacea. Accessed 16 Oct. 2026.

Medical Definition

: a chronic inflammatory skin disorder typically involving the nose, cheeks, forehead, and chin that is characterized especially by redness, flushing, telangiectasia, inflamed lesions, burning sensation, and sometimes eye dryness and irritation and thickening of tissues especially of the nose

called also acne rosacea

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