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.
Some research suggests omega-3s may also be beneficial for psoriasis, rosacea, and atopic dermatitis, among other conditions, though the evidence is mixed. Caroline Tien, SELF, 9 Mar. 2026 Since inflammation is linked to common concerns like acne, rosacea, and eczema, maintaining healthy levels could play a small role in keeping skin looking more even and less irritated. Amanda Le, InStyle, 7 Mar. 2026 Skin Issues Some skin conditions—particularly those associated with immune responses, including eczema, psoriasis, and rosacea—may be linked to gut health. Rena Goldman, Health, 17 Feb. 2026 Tablets are used to treat conditions caused by parasitic worms, and the FDA has approved ivermectin lotions to treat lice and rosacea. Rachana Pradhan, STAT, 10 Feb. 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 Mar. 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
Love words? Need even more definitions?

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

More from Merriam-Webster