quad
noun [ C ] uk/kwɒd/ us/kwɑːd/
(PERSON)
四胞胎之一(quadruplet的非正式说法)
informal for quadruplet
(SQUARE)
(formal quadrangle)(尤指中小学或大学中周围有建筑物的)四方院,四方场地
a square space outside with buildings on all four sides, especially in a school or college