The Collaborative International Dictionary
Interlapse
Interlapse \In"ter*lapse`\, n. [Pref. inter- + lapse: cf. L.
interlabi, interlapsus, to fall, slide, or flow, between.]
The lapse or interval of time between two events. [R.]
--Harvey.
Wiktionary
interlapse
n. The lapse or interval of time between two events.