What is the term for East/West lines on a map?

The term that describes East/West lines on a map is "parallels." These lines represent latitude, which is the angular measurement of distance north or south of the Equator. Parallels run parallel to the Equator and are equally spaced, which differentiates them from meridians that run from the North Pole to the South Pole.

While "latitudes" refers to the concept associated with these measurements, the specific term used to describe the lines themselves is "parallels." Parallels are significant as they help in identifying locations in terms of their angular distance from the Equator and contribute to the understanding of global geography.

Meridians and longitudes, on the other hand, are terms that refer to the North/South lines that measure angular distance from the Prime Meridian, further distinguishing the different functions and orientations of lines of latitude and longitude on a map.