Scab

·noun A mean, dirty, paltry fellow.

II. Scab ·noun The itch in man; also, the scurvy.

III. Scab ·noun The mange, ·esp. when it appears on sheep.

IV. Scab ·vi To become covered with a scab; as, the wound scabbed over.

V. Scab ·noun A disease of potatoes producing pits in their surface, caused by a minute fungus (Tiburcinia Scabies).

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

VII. Scab ·noun A slight irregular protuberance which defaces the surface of a casting, caused by the breaking away of a part of the mold.

VIII. Scab ·noun 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.

IX. Scab ·add. ·noun Any one of various more or less destructive fungus diseases attacking cultivated plants, and usually forming dark-colored crustlike spots.