erythemaPronunciation: /ˌɛrɪˈθiːmə/Definition of erythema noun [mass noun] Medicine superficial reddening of the skin, usually in patches, as a result of injury or irritation causing dilatation of the blood capillaries. Derivatives erythemal adjective erythematous adjective Origin: late 18th century: from Greek eruthēma, from eruthainein 'be red', from eruthros 'red'erythema in other Oxford dictionaries Definition of erythema in the US English dictionary
