The term RADIUS SETTING is composed of two words: 'RADIUS' and 'SETTING'. RADIUS is a line segment extending from the center of a circle or sphere to its circumference or surface. SETTING is the act of putting something in a certain place or position. Therefore, the term RADIUS SETTING refers to the act of adjusting the distance from the center of a circle or sphere to its circumference or surface. The crossword solution for this term is ARM, which stands for the act of moving or adjusting something.