excrescence

Definition: (noun) Something that bulges out or is protuberant or projects from its surroundings.
Synonyms: extrusion, gibbosity, hump, jut, bulge, protrusion, protuberance, swelling, bump, prominence.
Usage: A roof, Richard contended, was a part of the edifice that the ancients always endeavored to conceal, it being an excrescence in architecture that was only to be tolerated on account of its usefulness.
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