Hiatus
Hiatus , noun
[Latin, from hiare, hiatum, to gape; akin to English yawn. See Yawn.]
1.
An opening; an aperture; a gap; a chasm; esp., a defect in a manuscript, where some part is lost or effaced; a space where something is wanting; a break.
2.
(Grammar) The concurrence of two vowels in two successive words or syllables. — Pope