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Definition

Radian; a unit of plane angle.

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How it's used

This term is strictly reserved for mathematical and scientific contexts involving circular measurement. It is rarely encountered outside of a classroom or technical setting, as most people in casual conversation simply use the English loanword radian directly.

Examples

You need to use radians to calculate this math problem.

Common phrases

radian measure

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector