<p><strong>Noun</strong></p><ul><li>the incrustation that forms over a sore or wound during healing</li><li>Veterinary Pathology: a mangy disease in animals, especially sheep; scabies</li><li>Plant Pathology: a disease of plants characterized by crustlike lesions on the affected parts and caused by a fungus or bacterium</li><li>one of these crustlike lesions</li><li>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</li><li>Slang: a rascal or scoundrel</li><li>Metallurgy: a projection or roughness on an ingot or casting from a defective mold</li><li>a surface defect on an iron or steel piece resulting from the rolling in of scale</li><li>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</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>scabbed</li><li>to become covered with a scab</li><li>to act or work as a scab</li></ul>