Elision
WordNet
noun
(1) A deliberate act of omission
"With the exception of the children, everyone was told the news"
(2) Omission of a sound between two words (usually a vowel and the end of one word or the beginning of the next)
WiktionaryText
Noun
- The deliberate omission of something.
- The omission of a letter or syllable between two words; sometimes marked with an apostrophe.