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The Collaborative International Dictionary

Erythema \Er`y*the"ma\, n. [NL., fr. Gr. ?, fr. ? to redden, fr. 'eryqro`s red.] (Med.) A disease of the skin, in which a diffused inflammation forms rose-colored patches of variable size.

Douglas Harper's Etymology Dictionary

medical Latin, from Greek erythema "a redness on the skin; a blush; redness," from erythainein "to become red," from erythros "red" (see red (1)). Related: Erythematous.


n. 1 Abnormal redness and inflammation of the skin, due to vasodilation. 2 Skin redness from sunburn or chemical irritation


n. abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation)


Erythema (from the Greek erythros, meaning red) is redness of the skin or mucous membranes, caused by hyperemia (increased blood flow) in superficial capillaries. It occurs with any skin injury, infection, or inflammation. Examples of erythema not associated with pathology include nervous blushes.

Usage examples of "erythema".

The proper treatment for simple erythema consists in applying to the affected parts a little lime-water, or sweet-oil, or glycerine, with the use of warm baths and mild cathartics.

The lesions simulated are usually inflammatory in character, such as erythema, vesicular and bullous eruptions, and ulceration of the skin.

In one case the pleural cavity was washed out with a five per cent solution of boric acid and was followed by distressing symptoms, vomiting, weak pulse, erythema, and death on the third day.

Dauboeuf, Garraway, Hemming, Skinner, and Cobner mention roseola and scarlatiniform erythema after minute doses of quinin.

In 1998, thalidomide was approved to treat a rare disorder called erythema nodosum leprosum, and it may get approval for other diseases, like cancer, shortly.

Ultraviolet light, which causes both erythema (sunburn) and tanning, ranges in wavelength from 4,000 angstrom units (A) down to about 100A.