rosacea

noun

ro·​sa·​cea rō-ˈzā-sh(ē-)ə How to pronounce rosacea (audio)
: 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.
Gonzalez has been working with the new formula since July, and noticed that while the old foundation would sometimes pick up texture and her rosacea, the new one doesn’t. Kaitlin Clapinski, InStyle, 20 Jan. 2026 Yellow light, like red, has shown some promise in small studies for treating redness and rosacea, as well as soothing inflammation following in-office treatments like lasers. Brennan Kilbane, Allure, 15 Jan. 2026 Allowing over-the-counter access to ivermectin, which can be used to treat head lice, rosacea and certain infections. Marissa Payne, Des Moines Register, 13 Jan. 2026 Sensitive and sensitized skin like rosacea or eczema-prone really appreciate and see results with this formula. Rachel Burchfield, Forbes.com, 5 Jan. 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

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Cite this Entry

“Rosacea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rosacea. Accessed 4 Feb. 2026.

Medical Definition

rosacea

noun
ro·​sa·​cea rō-ˈzā-sh(ē-)ə How to pronounce rosacea (audio)
: 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

Last Updated: - Updated example sentences
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