erythema
noun
er·y·the·ma
ˌer-ə-ˈthē-mə 
: abnormal redness of the skin or mucous membranes due to capillary congestion (as in inflammation)
Examples of erythema in a Sentence
Recent Examples on the Web
Visible light has been shown to trigger erythema, or skin reddening, in lighter skin.
—
Andrea Muraskin,
NPR,
23 Aug. 2025
Each wavelength is measured through the McKinlay-Diffey erythema action spectrum.
—
Ella Gonzales,
Fort Worth Star-Telegram,
20 June 2025
Palmar erythema, sometimes called liver palms, is when both of your palms turn red.
—
Brandi Jones,
Health,
23 May 2025
The cream soothes erythema and conceals redness thanks to its natural green colouring and has been designed to use overnight.
—
Angelina Villa-Clarke,
Forbes.com,
17 Apr. 2025
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Andrea Muraskin,
NPR,
23 Aug. 2025
Each wavelength is measured through the McKinlay-Diffey erythema action spectrum.
—
Ella Gonzales,
Fort Worth Star-Telegram,
20 June 2025
Palmar erythema, sometimes called liver palms, is when both of your palms turn red.
—
Brandi Jones,
Health,
23 May 2025
The cream soothes erythema and conceals redness thanks to its natural green colouring and has been designed to use overnight.
—
Angelina Villa-Clarke,
Forbes.com,
17 Apr. 2025
Cite this Entry
“Erythema.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/erythema. Accessed 2 Jul. 2026.
Copy CitationMedical Definition
erythema
noun
er·y·the·ma
ˌer-ə-ˈthē-mə
: abnormal redness of the skin or mucous membranes due to capillary congestion (as in inflammation)
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