noun (radii, pl2=radiuses)
- (anatomy) The long bone in the forearm, on the side of the thumb.
- (geometry) A line segment between any point on the circumference of a circle and its center/centre.
- (geometry) The length of this line segment.
Etymology: radiusLatin, radius, "ray".
- Dutch: straal
- German: Halbmesser , Radius
- Spanish: radio
- French: rayon
Supplemental Details:Sponsor an extended definition for radius for as little as $10 per month. Click here to contact us.