What does radian mean?

Definitions for radian
ˈreɪ di ənra·di·an

Here are all the possible meanings and translations of the word radian.

Princeton's WordNet

  1. radian, radnoun

    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)


  1. radiannoun

    In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad

    Etymology: From radi(us) + -an

Webster Dictionary

  1. Radiannoun

    an arc of a circle which is equal to the radius, or the angle measured by such an arc

    Etymology: [From Radius.]


  1. Radian

    The radian is the standard unit of angular measure, used in many areas of mathematics. An angle's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle, so one radian is just under 57.3 degrees. The unit was formerly an SI supplementary unit, but this category was abolished in 1995 and the radian is now considered an SI derived unit. The SI unit of solid angle measurement is the steradian. The radian is represented by the symbol "rad" or, more rarely, by the superscript c. For example, an angle of 1.2 radians would be written as "1.2 rad" or "1.2c".

Chambers 20th Century Dictionary

  1. Radian

    rā′di-an, n. the angle subtended at the centre of a circle by an arc equal to the radius.

The Standard Electrical Dictionary

  1. Radian

    The angle whose arc is equal in length to the radius; the unit angle.

Matched Categories

Anagrams for radian »

  1. Adrian

  2. Darian

How to pronounce radian?

How to say radian in sign language?


  1. Chaldean Numerology

    The numerical value of radian in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of radian in Pythagorean Numerology is: 2

Images & Illustrations of radian

  1. radianradianradianradianradian

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    a game in which players throw or flip a jackknife in various ways so that the knife sticks in the ground
    • A. macron
    • B. mumblety-peg
    • C. congius
    • D. urus

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