a. [ Pref. bi- + rectangular. ] Containing or having two right angles;
a. [ CF. F. rectangulaire. ] Right-angled; having one or more angles of ninety degrees. --
n. The quality or condition of being rectangular, or right-angled. [ 1913 Webster ]
a. [ Pref. tri- + rectangular. ] (Spherical Trig.) Having three right angles. See Triquadrantal. [ 1913 Webster ]