Akademik

Eschar
The scab formed when a wound or skin is sealed by the heat of cautery or burning. Also the dark crusted ulcer (tache noire) at the site of the chigger (mite larva) bite in scrub typhus.
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A thick, coagulated crust or slough which develops following a thermal burn or chemical or physical cauterization of the skin. [G. eschara, a fireplace, a scab caused by burning]

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es·char 'es-.kär n a scab formed esp. after a burn

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n.
a scab or slough, as produced by the action of heat or a corrosive substance on living tissue.

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es·char (esґkahr) [Gr. eschara scab] 1. a slough produced by a thermal burn, by a corrosive application, or by gangrene. 2. the lesion seen in certain rickettsioses; see tache noire.

Medical dictionary. 2011.