Elision

(Latin: �striking out�), in prosody, the slurring or omission of a final unstressed vowel that precedes either another vowel or a weak consonant sound, as in the word heav'n. It may also be the dropping of a consonant between vowels, as in the word o'er for over. Elision is used to fit words into a metrical scheme, to smooth the rhythm of a poem, or to ease the pronunciation of words.