Толковый словарь английского языка Oxford English Reference - quadrangle

n. 1 a four-sided plane figure, esp. a square or rectangle. 2 a a four-sided court, esp. enclosed by buildings, as in some colleges. b such a court with the buildings round it. Derivatives quadrangular adj. Etymology: ME f. OF f. LL quadrangulum square, neut. of quadrangulus (as QUADRI-, ANGLE(1))