rec·tan·gu·lar 
(rĕk-tănggyə-lər)
(rĕk-tănggyə-lər)adj.
1. Having the shape of a rectangle.
2. Having right angles or a rectangular base, side, or sides: a rectangular box.
3. Designating a geometric coordinate system with mutually perpendicular axes.
rec·tan′gu·lari·ty (-lărĭ-tē) n.
rec·tangu·lar·ly adv.