noun

bisector

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Bisector (noun) means a line or curve that divides a line segment, angle, or other figure into two equal parts. Example: “The teacher drew a bisector through the angle to split it into two equal halves.”

noun

technical A line or curve that divides a line segment, angle, or other figure into two equal parts.

"The teacher drew a bisector through the angle to split it into two equal halves."

"A perpendicular bisector crosses a line segment at a right angle, exactly at its midpoint."

"To find the centre of the triangle, the students drew a bisector from each angle."

How to use bisector

Learner’s notes

In plain EnglishA bisector is simply the line that splits something, like an angle or a segment, into two equal halves.

When to use it

It is a maths term, used mainly in geometry lessons and technical writing.

Memory tip

Bisector is the noun for the line itself; bisect is the verb for the act of cutting something in half.

Trace the full origin ↓

Easily confused with

bisect →

Common pairings

angle bisector perpendicular bisector draw a bisector bisector of a segment

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C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

C2 · Advanced serendipity Fortunate discoveries made entirely by accident.

Gen Z slang rizz Charm — the ability to attract a romantic interest.

B2 · Intermediate empathy The capacity to share another person’s feelings.

C1 · Advanced nonchalant Casually calm and relaxed; unconcerned.

Internet slang delulu Delusional — believing something against the odds.

Etymology nostalgia Greek nostos “return home” + algos “pain”.

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Fill the gap

Can you complete this real example?

The teacher drew a _____ through the angle to split it into two equal halves.

Etymology

The word is formed from the verb bisect with the ending -or added, giving a noun for the thing that does the bisecting.

Origin: English

Rhymes for bisector

vector hector rector sector ejector Spector director detector defector injector inspector collector

See all rhymes for bisector →

Frequently asked questions

What is a bisector in geometry?

A bisector is a line or curve that cuts a segment, angle, or other figure into two equal parts.

What is an angle bisector?

An angle bisector is a line that splits an angle exactly in half, into two equal smaller angles.

What is a perpendicular bisector?

A perpendicular bisector is a line that crosses a segment at its exact midpoint and meets it at a right angle.

What is the meaning of bisector?

"bisector" (noun) means a line or curve that divides a line segment, angle, or other figure into two equal parts.