The term LINE ON A GLOBE is composed of two crossword solutions, ARC and EQUATOR. An ARC is a curved line that forms part of the circumference of a circle or other shape. On a globe, arcs are used to represent the lines of latitude, which are imaginary circles that run parallel to the equator. The equator is an imaginary line that divides the Earth into the Northern and Southern Hemispheres and is located at 0 degrees latitude.