Radial
>Pertaining to the radius, the smaller bone in the forearm.
The radial artery is so named because of its proximity to the radius.
>Pertaining to the radius of a circle.
>Spreading from a central point.
A radial keratotomy is an eye operation in which incisions are made in the cornea that resemble the spokes in a wheel.
</LI></OL> The word 'radial' comes from the Latin 'radius' meaning a spoke in a wheel which this bone was thought to resemble.
The word 'radiation' is derived from the same Latin word -- 'radius.'