- Arm bone; circle part - Forearm bone - Half-diameter - Range of operation on arm bone - Straight line from the centre of a circle - Straight line from the centre to the circumference of a circle - Surrounding area
- Ancient linear measure - Ancient measure - Old linear measures - Old measure - The forearm; the ulna, a bone of the arm extending from
elbow to wrist. - A measure of length, being the distance from the elbow to
the extremity of the middle finger.