radius

1 ENTRIES FOUND:
radius /ˈreɪdijəs/ noun
plural radii /ˈreɪdiˌaɪ/
radius
/ˈreɪdijəs/
noun
plural radii /ˈreɪdiˌaɪ/
Britannica Dictionary definition of RADIUS
[count]
1 
technical : a straight line from the center of a circle or sphere to any point on the outer edge
also : the length of this line — see picture at geometry; compare diameter
2 
: an area that goes outward in all directions from a particular place
3 
medical : the bone in the lower part of your arm on the same side as your thumb — see picture at human