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Scab

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

Scab

Definition: The itch in man; also, the scurvy.

Scab

Definition: The mange, esp. when it appears on sheep.

Scab

Definition: A disease of potatoes producing pits in their surface, caused
by a minute fungus (Tiburcinia Scabies).

Scab

Definition: A slight irregular protuberance which defaces the surface of
a casting, caused by the breaking away of a part of the mold.

Scab

Definition: A mean, dirty, paltry fellow.

Scab

Definition: A nickname for a workman who engages for lower wages than are
fixed by the trades unions; also, for one who takes the place of a
workman on a strike.

Scab

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