Barb
/bˈɑrb/
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Definition
(noun) The point that stands backward in an arrow, fishhook, etc., to prevent it from being easily extracted. Hence: Anything which stands out with a sharp point obliquely or crosswise to something else.
Sentence Examples
The barb on fishhooks make them difficult to remove.
My coat got caught on a barb on the barbed wire.
CEFR Practice Quiz
The fish hook has a small ____ to prevent it from slipping out.