Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun radian

1 sense of radian

Sense 1
radian, rad -- (the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees))
       => angular unit -- (a unit of measurement for angles)