In Ancient Greek elision is the complete elimination of a vowel (generally short) that is followed by another vowel in composition or at word-juncture.
Elision (Lat. elisiō, Gr. ékthlipsis, from ekthlíbō ‘squeeze out’) is the complete elimination of a vowel followed by another vowel. With crasis (or contraction) and aphaeresis, it is one of the strategies to eliminate vowel hiatus .
In Ancient Greek elision occurs in the domain of composition (compound nouns) and word-juncture:
epágō ‘lead on’ = epı́ + ágō, ep’ ṓmōn ‘over…