Definition of protrusion noun from the Oxford Advanced American Dictionary

 

protrusion

 noun
noun
NAmE//prəˈtruʒn//
 
, NAmE//proʊˈtruʒn//
 
[countable, uncountable](formal)
 
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a thing that sticks out from a place or surface; the fact of doing this a protrusion on the rock face
See the Oxford Advanced Learner's Dictionary entry: protrusion