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scab

American  
[skab] / skæb /

noun

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

  2. Veterinary Pathology. a mangy disease in animals, especially sheep; scabies.

  3. Plant Pathology.

    1. a disease of plants characterized by crustlike lesions on the affected parts and caused by a fungus or bacterium.

    2. one of these crustlike lesions.

  4. 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.

  5. Slang. a rascal or scoundrel.

  6. Metallurgy.

    1. a projection or roughness on an ingot or casting from a defective mold.

    2. a surface defect on an iron or steel piece resulting from the rolling in of scale.

  7. 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.


verb (used without object)

scabs, present (3rd person singular) scabbed, past participle, past scabbing present participle
  1. to become covered with a scab.

  2. to act or work as a scab.

scab British  
/ skæb /

noun

  1. the dried crusty surface of a healing skin wound or sore

  2. a contagious disease of sheep, a form of mange, caused by a mite ( Psoroptes communis )

  3. a fungal disease of plants characterized by crusty spots on the fruits, leaves, etc

  4. derogatory

    1. Also called: blackleg.  a person who refuses to support a trade union's actions, esp one who replaces a worker who is on strike

    2. ( as modifier )

      scab labour

  5. a despicable person

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to become covered with a scab

  2. (of a road surface) to become loose so that potholes develop

  3. to replace a striking worker

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
scab Scientific  
/ skăb /
  1. A crust that forms over a healing wound, consisting of dried blood, plasma, and other secretions.


scab Cultural  
  1. Informally, a worker who stays on the job while others go on strike. Also, a worker brought in to keep a plant operating when its work force is on strike. (See strikebreaker.)


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Etymology

Origin of scab

1200–50; 1800–10 scab for def. 4; Middle English < Old Norse skabb scab, itch; cf. shabby, shave

Explanation

Kids who fall and skin their knees know what a scab is: it's the crusty patch of skin that forms when a scrape or cut is healing. A wound will form a scab as it heals, whether it's a cut or a burn. Skin has an amazing ability to repair itself, and a scab is evidence of this. Scab is also a slang term for someone who crosses a picket line during a strike, choosing to work instead of joining coworkers in protesting low wages or harsh treatment by an employer. This kind of scab first meant "unpleasant person" in the late 1500s.

Keep Reading on Vocabulary.com

Vocabulary lists containing scab

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

As cliches mount, the reader half expects the next phone call to be answered by old Scab Cooley.

From Time Magazine Archive

Scab and other diseases caused a large proportion of the fruit set to drop, and the remainder was unsalable in unsprayed orchards.

From Trees, Fruits and Flowers of Minnesota, 1916 Embracing the Transactions of the Minnesota State Horticultural Society,Volume 44, from December 1, 1915, to December 1, 1916, Including the Twelve Numbers of "The Minnesota Horticulturist" for 1916 by Latham, A. W.

"Scab leader!" he shouted, turning and facing the girls.

From Windy McPherson's Son by Anderson, Sherwood

Then while the new engineer got up steam, Captain Scraggs went up to Scab Johnny's office for his final instructions and the balance of the first instalment due him.

From Captain Scraggs or, The Green-Pea Pirates by Grant, Gordon

Scab was little known any where, but in the Highlands, and the south of England, till the good old custom of smearing with tar and butter gave way before the elegant modern innovations.

From A Treatise on Sheep: The Best Means for their Improvement, General Management, and the Treatment of their Diseases. by Blacklock, Ambrose

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