D defs.my
Entry 2 senses Webster, 1913

Interstice

· In·ter·stice · IPA /ɪnˈtɚ.stəs/
01 n. That which intervenes between one thing and another; especially, a space between things closely set, or between the parts which compose a b…
pl. Interstices ((#))
  1. 1.
    That which intervenes between one thing and another; especially, a space between things closely set, or between the parts which compose a body; a narrow chink; a crack; a crevice; a hole; an interval; as, the interstices of a wall.
  2. 2.
    An interval of time; specifically (R. C. Ch.), in the plural, the intervals which the canon law requires between the reception of the various degrees of orders.(R. C. Ch.)
    “Nonobservance of the interstices . . . is a sin.” — Addis & Arnold.