What is another term for latitude lines?

Latitude lines are referred to as parallels because they run parallel to the Equator and to each other. This terminology highlights that each line of latitude maintains a consistent distance from the lines above and below it, creating a series of horizontal lines around the globe. These parallels extend from the North Pole to the South Pole and are used to measure the angular distance north or south of the Equator, expressed in degrees.

The other terms do not apply to latitude lines in the same way. Altitude refers to the height of an object above a reference point, typically sea level, which measures vertical distance, not horizontal. Longitude lines, on the other hand, run from pole to pole and are used to measure the angular distance east or west of the Prime Meridian. The Equator is a specific line of latitude located at 0 degrees, serving as the baseline for determining latitude, but it is not a synonym for latitude lines in general. Thus, the term "parallels" accurately reflects the nature and configuration of latitude lines.