|1.||denoting, relating to, or resembling an abnormal outgrowth|
|2.||uselessly added; not essential; superfluous|
|3.||denoting or relating to a speech sound or letter inserted into a word without etymological justification, such as the b in nimble|
|[C17: from Latin excrēscēns, from excrēscere, from crēscere to grow]|
excrescent ex·cres·cent (ĭk-skrěs'ənt)
Growing out abnormally, excessively, or superfluously.