Definition of fang noun from the Oxford Advanced Learner's Dictionary

 

fang

 noun
noun
BrE BrE//fæŋ//
 
; NAmE NAmE//fæŋ//
 
[usually plural] Parts of animals
 
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either of two long sharp teeth at the front of the mouths of some animals, such as a snake or dog The snake sank its fangs into its victim. The wolf growled and bared its sharp fangs. See related entries: Parts of animals Word Origin late Old English (denoting ‘booty’ or ‘spoils’), from Old Norse fang ‘capture, grasp’. A sense ‘trap, snare’ is recorded from the mid 16th cent.; both this and the original sense survive in Scots. The current sense (also mid 16th cent.) reflects the same idea of ‘something that catches and holds’.
See the Oxford Advanced American Dictionary entry: fang