quadrangle

n 1 plane figurewith four sides, esp a square or rectangle 四边形; （尤指）正方形, 长方形. 2 (fml 文) four-sided courtyard surrounded by large buildings, eg in an Oxford college （四周由大型建筑物围绕的）方形庭院（如於牛津大学学院的）.

pyrotechnics, Pyrrhic victory, python, Q, Q, q, QB, QC, QE2, QED, qr, qt, qto, qty, qua, quack, quack-quack, quackery, quad, quadr(i)-, Quadragesima, quadrangular, quadrant, quadraphonic (also quadrophonic), quadraphony (also quadrophony), quadratic equation, quadrennial, quadrilateral, quadrille, quadrillion, quadrophonic, quadrophony, quadruped, quadruple, quadruplet, quadruplicate, quaff, quagmire, quail, quaint, quaintly, quaintness,