a line or plane that bisects an angle or line segment.
Origin of bisector
First recorded in 1860–65; bisect
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for bisector
Historical Examples of bisector
The bisector of an angle of a triangle divides the opposite side into segments which are proportional to the adjacent sides.
This proposition enables us to compute the length of a bisector of a triangle if the lengths of the sides are known.
British Dictionary definitions for bisector
a straight line or plane that bisects an angle
a line or plane that bisects another line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for bisector
1821; agent noun from bisect.
Online Etymology Dictionary, © 2010 Douglas Harper