Pronunciation: (ik-skres'unt), [key]
1. growing abnormally out of something else; superfluous.
2. Phonet.(of a speech sound) inserted or added as a result of articulatory interaction or impetus, as the t-sound in sense (sents) or against (from Middle English ageynes), without grammatical or historical justification; intrusive; parasitic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.