RADIAN

Pronunciation (US):

(GB):

 Dictionary entry overview: What does radian mean? 

• RADIAN (noun)
  The noun RADIAN has 1 sense:

1. 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)

  Familiarity information: RADIAN used as a noun is very rare.

 Dictionary entry details 

• RADIAN (noun)

Sense 1

Meaning:

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)

Classified under:

Nouns denoting quantities and units of measure

Synonyms:

rad; radian

Hypernyms ("radian" is a kind of...):

angular unit (a unit of measurement for angles)

Meronyms (parts of "radian"):

milliradian (a unit of angular distance equal to one thousandth of a radian)

 Context examples 

One radian is about 57 degrees and one degree is pi/180 radians.

(Degree Unit of Plane Angle, NCI Thesaurus)

A traditional unit of plane angle measurement equal to two pi radians or 360 degrees.

(Circle Unit of Plane Angle, NCI Thesaurus)