Scab
/skˈæb/
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Definition
(noun) An incrustation over a sore, wound, vesicle, or pustule, formed during healing.
Sentence Examples
Tom's wound was still weeping and had yet to scab over.
His belly button hole is going to scab up.
CEFR Practice Quiz
She resisted the urge to pick at the ____ on her knee as it healed.