Scab
Scab (skab) , noun
[Old English scab, scabbe, shabbe; compare Anglo-Saxon scaeb, sceabb, scebb, Danish & Swedish skab, and also Latin scabies, from scabere to scratch, akin to English shave. See Shave, and compare Shab, Shabby.]
1.
An incrustation over a sore, wound, vesicle, or pustule, formed by the drying up of the discharge from the diseased part.
2.
The itch in man; also, the scurvy. [Colloquial or Obsolete]
3.
The mange, esp. when it appears on sheep. — Chaucer
4.
A disease of potatoes producing pits in their surface, caused by a minute fungus (Tiburcinia Scabies).
5.
(Founding) A slight irregular protuberance which defaces the surface of a casting, caused by the breaking away of a part of the mold.
6.
A mean, dirty, paltry fellow. [Low] — Shakespeare
7.
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. [Cant]
8.
(Botany) Any one of various more or less destructive fungus diseases attacking cultivated plants, and usually forming dark-colored crustlike spots.
Scab , intransitive verb
1.
To become covered with a scab; as, the wound scabbed over.
2.
to take the place of a striking worker.