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

 

excrescence

 noun
noun
BrE BrE//ɪkˈskresns//
 
; NAmE NAmE//ɪkˈskresns//
 
(formal)
 
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an ugly lump that has grown on a part of an animal’s body or on a plant A hard, bony excrescence was visible above one of the animal’s hooves. (figurative) The new office block is an excrescence (= it is very ugly). Word Origin late Middle English: from Latin excrescentia, from excrescere ‘grow out’, from ex- ‘out’ + crescere ‘grow’.
See the Oxford Advanced American Dictionary entry: excrescence