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bisector

American

[bahy-sek-ter, bahy-sek-] / baɪˈsɛk tər, ˈbaɪ sɛk- /

noun

Geometry.

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

bisector British

/ baɪˈsɛktə /

noun

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

Etymology

Origin of bisector

First recorded in 1860–65; bisect + -or ²

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

So, if double, angle is 60°. is the perpendicular bisector of so it cuts in half.

From Textbooks • Dec. 1, 2021

Angle is double angle so its measure is 60°. is the perpendicular bisector of so it cuts in half.

From Textbooks • Feb. 13, 2015

Clearly there will be only one such pair unless the perpendicular bisector of GG' coincides with the line AA'.

From An Elementary Course in Synthetic Projective Geometry by Lehmer, Derrick Norman

These can easily be shown to intersect, as at O. Then O, being equidistant from A, B, and C, is also on the perpendicular bisector of AC.

From The Teaching of Geometry by Smith, David Eugene

The bisector of an angle of a triangle divides the opposite side into segments which are proportional to the adjacent sides.

From The Teaching of Geometry by Smith, David Eugene

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023