From Longman Dictionary of Contemporary Englishprotrusionpro‧tru‧sion /prəˈtruːʒən $ proʊ-/ noun [countable] formalSTICK OUT something that sticks out
Examples from the Corpus
protrusion• The foot is reduced to a protrusion that they use to pull themselves down into the sand.• I recall... the shocking distension and protrusion of the eyeballs of dead men and dead horses.• Odd horns and protrusions covered their faces.• Intense pain in the root of the tongue on protrusion may be present or the sensation of a hair on the tongue.• These protrusions swelled until they eventually budded off the oil layer. 