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bisector

[bahy-sek-ter, bahy-sek-]

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noun Geometry.

a line or plane that bisects an angle or line segment.

Origin of bisector

First recorded in 1860–65; bisect + -or²

Dictionary.com Unabridged 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.
The Teaching of Geometry
David Eugene Smith
This proposition enables us to compute the length of a bisector of a triangle if the lengths of the sides are known.
The Teaching of Geometry
David Eugene Smith

British Dictionary definitions for bisector

bisector

noun maths

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bisector

n.

1821; agent noun from bisect.

Online Etymology Dictionary, © 2010 Douglas Harper