sepositio
From LSJ
sēpŏsĭtĭo: ōnis, f. sepono,
I a laying aside, setting apart, hoarding: pecuniae, Veg. Mil. 2, 20.—
II A separation (postclass.): si forte qui decimam vovit decesserit ante sepositionem (for which, just before, separata), Dig. 50, 12, 2, § 2.