Definition of rosacea
: 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
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Merriam-Webster unabridged
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Time Traveler for rosacea
The first known use of rosacea was in 1843
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