the incrustation that forms over a sore or wound during healing.

Veterinary Pathology . a mangy disease in animals, esp. sheep; scabies. Compare itch ( def. 10 ) .

Plant Pathology .

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 worker who refuses to join a labor union or to participate in a union strike, who takes a striking worker's place on the job, or the like.

Slang . a rascal or scoundrel.

Metallurgy .

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.

Carpentry . a short, flat piece of wood used for various purposes, as binding two timbers butted together or strengthening a timber at a weak spot.

to become covered with a scab.

to act or work as a scab.

noun

apostate , blackleg , eschar , incrustation , mange , scoundrel , strikebreaker