American English

Definition of excrescence noun from the Oxford Advanced American Dictionary



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  1. 1an 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.
  2. 2(figurative) The new office building is an excrescence (= it is very ugly).
See the Oxford Advanced Learner's Dictionary entry: excrescence