Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Radian" Definition
noun
A unit of angular measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57°17ʹ44.6〞. See Table at measurement.
Source: American Heritage Dictionary
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 or approximately 57.3 degrees.
Source: Merriam-Webster
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