Excrescent Definition
 ĭk-skrĕsənt 
    adjective
  
 Forming an excrescence; growing abnormally; superfluous.
 Webster's New World 
Designating or of an epenthetic sound or letter in a word.
 Webster's New World 
    noun
  
 Something growing, usually abnormally, out of something else.
 Wiktionary 
(phonetics) A sound in a word without etymological reason.
"B" in "nimble" is an excrescent.
 Wiktionary 
Other Word Forms of Excrescent
Noun
Singular:
 excrescentPlural:
 excrescentsOrigin of Excrescent
-  
From Latin excrēscēns, present participle of excrēscō.
From Wiktionary
 
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