scissure
A longitudinal opening made by cutting; a cleft; a fissure.
the soul is without any further act of violence forced out of its place , that it takes its flight home to heaven , being thus let out at the scissure, as at the window ; and only the two fragments of carcase remain behind
Where it comes from
From Late Latin scissura (“fissure”), from Latin scissurus (“about to split”), from scindo (“to split”).
Adapted from the Wiktionary entry scissure (CC BY-SA 4.0).