er·​y·​them·​a·​tous ˌer-ə-ˈthe-mə-təs How to pronounce erythematous (audio)
: exhibiting abnormal redness of the skin or mucous membranes due to the accumulation of blood in dilated capillaries (as in inflammation) : relating to or marked by erythema
an erythematous rash
Skin examination revealed multiple discrete, erythematous, scaly, indurated papules on the lower back and buttocks, areas which had not previously been affected.Jashin J. Wu et al.

Examples of erythematous in a Sentence

Recent Examples on the Web It’s also used to treat autoimmune diseases like systemic lupus erythematous and rheumatoid arthritis. Ella Lee, USA TODAY, 20 Aug. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'erythematous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1787, in the meaning defined above

Time Traveler
The first known use of erythematous was in 1787

Dictionary Entries Near erythematous

Cite this Entry

“Erythematous.” Dictionary, Merriam-Webster, Accessed 21 Sep. 2023.

Medical Definition


er·​y·​them·​a·​tous ˌer-ə-ˈthem-ət-əs, -ˈthēm-ət-əs How to pronounce erythematous (audio)
variants also erythemic
: relating to or marked by erythema
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