off-glide

noun Phonetics.

1. a transitional sound produced as the vocal organs move from a previous speech sound to an inactive position or to the position of a following sound.Compare on-glide.
2. the final, weaker part of a complex vowel, such as a diphthong, as the (i) sound of the (oi) in boy.

noun

1. phonetics a glide caused by the movement of the articulators away from their position in articulating the previous speech soundCompare on-glide