Dictionary entry

Interjacence

Webster's Dictionary 1913

{ In′ter‐ja″cence (?), In′ter‐ja″cen‐cy (?), } n. [See Interjacent.] The state of being between; a coming or lying between or among; intervention; also, that which lies between.

England and Scotland is divided only by the interjacency of the Tweed. Sir M. Hale.