Definition of: interstice

(in·tûr′stis) noun
1. An opening in anything.
2. A narrow space between adjoining parts or things.
3. A crack; crevice; chink; cranny.
4. An interval of time; specifically, the interval that canon law requires between promotions from one order to another in the Roman Catholic Church. [<F <L interstitium <interstitus, pp. of intersistere stand between <inter- between + sistere cause to stand <stare stand]