- a disease of plants characterized by crustlike lesions on the affected parts and caused by a fungus or bacterium.
- one of these crustlike lesions.
- a projection or roughness on an ingot or casting from a defective mold.
- a surface defect on an iron or steel piece resulting from the rolling in of scale.
verb (used without object), scabbed, scab·bing.
Origin of scab
Related Words for scabblister, flaw, disfigurement, wound, defect, crater, discoloration, layer, surface, skin, leaf, exfoliate, sliver, track, hurt, mark, pockmark, cicatrice, cicatrix, eruption
Examples from the Web for scab
Historical Examples of scab
Threats against "scabs" were shouted out, the word "scab" arose on every side.The Harbor
In those days they used a scab from the arm of someone who had been vaccinated.Old Rail Fence Corners
When the scab was all off, the nose was found to be quite uninjured.The Civilization Of China
Herbert A. Giles
This scab is caused by a fungous growth on the surface of the potato.Agriculture for Beginners
Charles William Burkett
With the same (or Bordeaux for scab) just after the blossoms fall.Apple Growing
M. C. Burritt
- Also called: blacklega person who refuses to support a trade union's actions, esp one who replaces a worker who is on strike
- (as modifier)scab labour
verb scabs, scabbing or scabbed (intr)
Word Origin for scab
mid-13c., "skin disease," developed from Old English sceabb "scab, itch" (related to scafan "to shave, scrape, scratch") and from Old Norse skabb "scab, itch," both from Proto-Germanic *skab- "scratch, shave," from PIE *(s)kep- "to cut, scrape, hack" (see scabies). Sense reinforced by cognate Latin scabies "scab, itch, mange" (from scabere "to scratch").
Meaning "crust which forms over a wound or sore" is first attested c.1400. Meaning "strikebreaker" first recorded 1806, from earlier sense of "person who refuses to join a trade union" (1777), probably from meaning "despicable person" (1580s), possibly borrowed in this sense from Middle Dutch.