interstice
Cross references: 1. aperture in.ter.stice \in-'t*r-st*s\ \-st*-.se-z, -st*-s*z\ n or in.ter.stic.es [F, fr. LL interstitium, fr. L interstitus, pp. of intersistere)] plX to stand still in the middle, fr. inter- + sistere to come to a stand; akin to L stare to stand : a space that intervenes between things : INTERVAL; esp : one between closely spaced things