- quadrangle (n.)
- late 14c., from Old French quadrangle (13c.), from Late Latin quadrangulum "four-sided figure," properly neuter of Latin adjective quadrangulus "having four quarters," from Latin quattuor "four" (see four) + angulus "angle" (see angle (n.)). The shortened form quad for "quadrangle of a college," is first recorded 1820 in Oxford slang.