scab

From Wiktionary

Pronunciation[change]

Noun[change]

Singular
scab

Plural
scabs

Scab
  1. (countable) A scab is made from dried blood and plasma, and forms over a wound.
    The boy kept picking at his scab until the wound began to bleed.
  2. (countable) A scab is a person who works during a strike.
    The workers shouted abuse at the scabs who went into the factory.