# Definition of 'radian'

noun

Collins English Dictionary. Copyright © HarperCollins Publishers

## Word origin of 'radian'

C19: from radius noun

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.

## Word origin of 'radian'

< radiusWord Frequency

## radian in Electrical Engineering (reɪdiən) or rad

Word forms: (regular plural) radians

noun

( Electrical engineering : General )

The radian is the plane angle between two radii of a circle that cut off on the circumference
an arc equal in length to the radius.

The radian is the standard unit of angular measure, used in many areas of mathematics.

Since radians are a unit-less measurement the normalized angular frequency is sometimes referred
to as inverse samples.

The radian is the plane angle between two radii of a circle that cut off on the circumference
an arc equal in length to the radius.

Collins English Dictionary. Copyright © HarperCollins Publishers

## Word Lists

Mathematical terms## Trends of 'radian'

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