Answer: quadrangles

AnswerCrossword Clue
QUADRANGLESStudent milieus
quadranglesA four-sided plane figure, esp. a square or rectangle
quadranglesThe area shown on a standard topographic map sheet of the US Geological Survey
quadranglesQUADRANGLE, a plane figure with four angles (and therefore four sides)
quadranglesA square or rectangular space or courtyard enclosed by buildings