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Definition of Kerion
1. Noun. Ringworm infection of the hair follicles of the scalp and beard that usually results in a swelling that is covered with pustules and oozes fluid.
Medical Definition of Kerion
1. A granulomatous secondarily infected lesion complicating fungal infection of the hair; typically, a raised boggy lesion. Origin: G. Kerion, honeycomb; a skin disease, fr. Keros, beeswax (05 Mar 2000)