The crossword solution for the term 'MIDDLE NAME' is 'EQUATOR', which is a seven-letter word. An equator is an imaginary line that divides the Earth into two hemispheres, the Northern Hemisphere and the Southern Hemisphere. It is also the line of latitude at 0 degrees, which is the same distance from the North Pole and the South Pole. The equator is the widest circle around the Earth and is the longest line of latitude.