Meaning of RADIUS in English


transcription, транскрипция: [ ˈrā-dē-əs ]


( plural ra·dii -dē-ˌī ; also ra·di·us·es )

Etymology: Latin, ray, radius

Date: circa 1611

1. : a line segment extending from the center of a circle or sphere to the circumference or bounding surface


a. : the bone on the thumb side of the human forearm ; also : a corresponding part of vertebrates above fishes

b. : the third and usually largest vein of an insect's wing


a. : the length of a radius

a truck with a short turning radius

b. : the circular area defined by a stated radius

c. : a bounded or circumscribed area

4. : a radial part

5. : the distance from a center line or point to an axis of rotation

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