rectangle
n.
1570s, from Middle French rectangle (16c.) and directly from Late Latin rectangulum, from rect-, comb. form of Latin rectus "right" (see right, adj.1) + Old French angle (see angle, n.). Medieval Latin rectangulum meant "a triangle having a right angle."
〔李〕[rect-;anglen.] n.长方形； 矩形 ←angul,angl (L angulus)=angle 角
〔蒋〕[rect直，angle角;’直角的图形”] 矩形，长方形
〔李〕[rect=right直，垂直的；angle n.角→“figure having only right angles只有直角的图形”→] n. four-sided figure with four right angles矩形▽rectangular [rectang(le);-ular a.] a.矩形的；成直角的rectilineal [rect=straight直；-i-;line=line线；-al a.=of ……的→] a. of a straight line直线的