RADIAN
Source: 567
Ra″di‐an (–an), n. [[From Radius.]] (Math.) An arc of a circle which is equal to the radius, or the angle measured by such an arc.
Source: 567
Ra″di‐an (–an), n. [[From Radius.]] (Math.) An arc of a circle which is equal to the radius, or the angle measured by such an arc.