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Redness of the skin caused by dilatation and congestion of the capillaries, often a sign of inflammation or infection.

[Greek eruthēma, from eruthainein, to redden, be red, from eruthros, red; see reudh- in Indo-European roots.]

er′y·them′a·tous (-thĕm′ə-təs, -thē′mə-), er′y·the·mat′ic (-măt′ĭk), er′y·the′mic adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.erythematous - relating to or characterized by erythema
References in periodicals archive ?
The skin of the external auditory canal was mildly erythematous.
When he arrived at HTD, he was systemically well but had a raised nontender erythematous lesion below his left axilla.
A 68-year-old woman with ESRD secondary to Systemic Lupus Erythematous (SLE) selected CAPD therapy, following pre-dialysis education.