cab
n
1 [C, U] dry crust formed over a wound or sore as it heals 痂.
2 [U] disease of skin or plants causing scab-like roughness 疥癬: sheep-scab 羊疥癬.
3 [C] (infml derog 口, 貶) worker who refuses to join a strike or a trade union, or who takes the place of a striker; blackleg 拒絕參加罷工的工人; 拒不參加工會的工人; 頂替罷工者工作的人; 工賊.