the GNU version of the Collaborative International Dictionary of English
adj. Lying or being between or among; intervening.
The Century Dictionary and Cyclopedia
Lying or being between; intervening: as, interjacent isles.
Word Usage
"The interjacent eight mayors, and the number of years they served, are O'Dwyer - 5, Impellitteri - 3, Wagner - 12, Lindsay - 8, Beame - 4, Koch - 12, Dinkins - 4 and Giuliani - 8."