e·li·sion 
(ĭ-lĭzhən)
(ĭ-lĭzhən)n.
1.
a. Omission of a sound that would normally be pronounced in speaking a word.
b. The combination of two syllables into one for the purposes of poetic scansion.
2. The act or an instance of omission.
[Latin ēlīsiō, ēlīsiōn-, from ēlīsus, past participle of ēlīdere, to strike out; see ELIDE.]