An excrescent appendage, as, a wart or tumor; anything growing out unnaturally from anything else; a preternatural or morbid development; hence, a troublesome superfluity; an incumbrance; as, an excrescence on the body, or on a plant.
The insertion of a consonant into a consonant cluster that lengthens the cluster, such as the insertion of [p] into the final consonant cluster in the word warmth.