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   Ra·di·us

   /ˈrādēəs/

   

   noun

   • 1. a straight line from the center to the circumference of a circle or sphere.
   • ▪ a radial line from the focus to any point of a curve.
   • ▪ the length of the radius of a circle or sphere.
   • ▪ a specified distance from a center in all directions: "there are plenty of local pubs within a two-mile radius"
   • 2. the thicker and shorter of the two bones in the human forearm.
   • ▪ the corresponding bone in a vertebrate's foreleg or a bird's wing.
   • ▪ any of the main veins in an insect's wing.
   • 3. (in an echinoderm or coelenterate) any of the primary axes of radial symmetry.

   verb

   • 1. give a rounded form to (a corner or edge): "Brian carefully radiused all the sharp edges and corners"

   Word Origin late 16th century (in radius (sense 2 of the noun)): from Latin, literally ‘staff, spoke, ray’.

   Scrabble Points: 7

   • R

     1

   • A

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   • D

     2

   • I

     1

   • U

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   • S

     1

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