An incrustation over a sore, wound, vesicle, or pustule, formed by the drying up of the discharge from the diseased part.

To become covered with a scab; as, the wound scabbed over.

form a scab; "the wounds will eventually scab"

a dried secretion or exudate (eg, blood, pus, serum) upon the skin which follows vesicles, pustules, weeping eczema, other inflammatory and infectious diseases, cuts and abrasions

Crust discharged from and covering a healing wound.