n. [ Pref. bi- + vector. ] (Math.) A term made up of the two parts &unr_; + &unr_;1 &unr_;-1, where &unr_; and &unr_;1 are vectors. [ 1913 Webster ]
n. One who, or that which, bisects; esp. (Geom.) a straight line which bisects an angle. [ 1913 Webster ]