The term for a line of latitude at 0 degrees is the Equator. The Equator divides the Earth into the Northern and Southern Hemispheres and is significant in geography and climate. It lies equidistant between the poles and is characterized by consistent daylight and warm temperatures throughout the year. The Equator also serves as a reference point for measuring latitude, with lines of latitude expressed in degrees north or south of the Equator. This has implications for global climate patterns, biodiversity, and navigation on Earth.