synaeresis

1. When two syllables are contracted into one. A kind of metaplasm. (Silva Rhetoricae)

2. Contraction: a contraction of two vowels or syllables into one.; SYNAERESIS [synairesis] Contrictio, Contraction. It is a contraction of two words or syllable into one.(JG Smith)

3. Synaeresis, a taking or drawing together, whereby two vowels are not changed, but coalesce into a diphthong, as aeronaut for aeronaut. (Macbeth)

4. Synoeresis, whenever it indites, Still into one two syllables unites. (Holmes)

1. When New Orleans is pronounced "Nawlins" (Silva Rhetoricae)

3. "In seventeen hunner fifty-nine,
The de'il gat stuff to mak a swine;
But flung it in a corner.
But afterward he changed his plan,
And made it something like a man,
And ca't it - Andra Turner." - Robert Burns (Macbeth)

4. Alveo, a dissyllable, for Alveo, a trissyllable. (Holmes)