excrescent adjective. 
[ɪk'skrɛs(ǝ)nt, ɛks-] L15.[Latin excrescent-: see EXCRESCENCE, -ENT.]1.  Increased by addition, greater; constituting more than the normal quantity. Now 
rare. 
L15.2.  That grows out naturally. Now 
rare or 
obsolete. 
M17.3.  Growing abnormally; forming or constituting an excrescence; redundant, superfluous. 
M17.4.  Philology. Of a sound or letter in a word: due merely to euphony, not to derivation. 
L19. ■   excre'scential adjective of the nature of an excrescence; redundant, superfluous: 
M19.  [TahlilGaran] English Dictionary ▲