erythematous

adjective

er·​y·​them·​a·​tous ˌer-ə-ˈthe-mə-təs 

: 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.

Word History

First Known Use

1787, in the meaning defined above

Medical Definition

erythematous

adjective

er·​y·​them·​a·​tous ˌer-ə-ˈthem-ət-əs, -ˈthēm-ət-əs 

variants also erythemic

-ˈthē-mik 

: relating to or marked by erythema