- [countable]
a hard dry layer that forms over and covers a wound on the skin as it gets better 痂 - [countable] (informal, disapproving)
a worker who refuses to join a strike or takes the place of somebody on strike 拒绝参加罢工的工人；顶替罢工者上班的工人；工贼 - [uncountable]
a skin disease of animals （动物）疥癣 - [uncountable]
a disease of plants, especially apples and potatoes, that causes a rough surface （植物）疮痂病，斑点病
Word OriginMiddle 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’.