onglide

• on-glide

From on- +‎ glide. Compare Middle English ongliden (“to glide over”).

onglide (plural onglides)

1. (linguistics) A phase while the articulators are moving into position to produce a new speech sound.
2. (linguistics) The first, weaker part of a complex vowel, such as a diphthong, as the /j/ sound of the /juː/ in English few.

• offglide

• doeling, glenoid