RADIAN


Meaning of RADIAN in English

transcription, транскрипция: [ ˈrā-dē-ən ]

noun

Date: 1879

: a unit of plane angular measurement that is equal to the angle at the center of a circle subtended by an arc whose length equals the radius or approximately 57.3 degrees

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.