The term 'radius' is a word used to describe the LENGTH of a line segment from the center of a circle to its circumference. The crossword solutions for this term include 'AMBIT' (5 letters), which is the scope or RANGE of something; 'LENGTH' (6 letters), which is the measurement of the longest dimension of an object; 'EXTENSION' (9 letters), which is the act of increasing the size, scope, or duration of something; 'EXTENT' (6 letters), which is the degree or amount to which something extends; 'COMPASS' (7 letters), which is an instrument used to determine direction; 'RANGE' (5 letters), which is the AREA between two limits; and 'AREA' (4 letters), which is the EXTENT of a particular surface. Finally, 'SPOKE' (5 letters) is a term used to describe the line segments that connect the center of a circle to its circumference.