scab

Từ điển Oxford Advanced Learner 8th

scab [scab scabs scabbed scabbing] BrE [skæb] NAmE [skæb] noun
1. countable a hard dry covering that forms over a wound as it heals
2. uncountable a skin disease of animals
3. uncountable a disease of plants, especially apples and potatoes, that causes a rough surface
4. countable (informal, disapproving)a worker who refuses to join a strike or takes the place of sb on strike
Syn: ↑blackleg

Word Origin:
Middle English (as a noun): from Old Norse skabb; related to dialect shab (compare with ↑shabby). The sense ‘contemptible person’ (dating from the late 16th cent.) was probably influenced by Middle Dutch schabbe ‘slut’.

• Từ đồng nghĩa / Synonyms:
  strikebreaker, blackleg, rat, fink