excrescence

Etymology

From Middle English, early 15th century, in sense “(action of) growing out (of something else)”. Borrowed from Latin excrescentia (“abnormal growths”), from excrescentem, from excrēscere, from ex- (“out”) (English ex-) + crēscere (“to grow”) (English crescent). Sense of “abnormal growth” from 1570s, from earlier excrescency (1540s in this sense).

noun

1. Something, usually abnormal, which grows out of something else.
2. A disfiguring or unwanted mark or adjunct.
3. (phonetics) The epenthesis of a consonant, e.g., warmth as [ˈwɔrmpθ] (adding a [p] between [m] and [θ]), or -t (Etymology 2).