Substantiv
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| scab -
An incrustation over a sore, wound, vesicle, or pustule, formed during healing.
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| scab -
The scabies.
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| scab -
The mange, especially when it appears on sheep.
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| scab -
Several different diseases of potatoes producing pits and other damage on their surface, caused by Streptomyces -bacteria.
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| scab -
Short form for common scab, a relatively harmless variety of scab caused by Streptomyces scabies.
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| scab -
Any one of various more or less destructive fungus diseases attacking cultivated plants, and forming dark-colored crustlike spots.
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| scab -
A slight irregular protuberance which defaces the surface of a casting, caused by the breaking away of a part of the mold.
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| scab -
A mean, dirty, paltry fellow.
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| scab -
A worker who acts against trade union policies, especially a strikebreaker.
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Verb
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| scab -
To become covered by a scab or scabs.
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| scab -
To form into scabs and be shed, as damaged or diseased skin.
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| scab -
To remove part of a surface from.
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| scab -
To act as a strikebreaker.
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| scab -
To beg for, to cadge or bum.
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