What term is used to refer to North/South lines on a map?

The term that refers to North/South lines on a map is "meridians." Meridians are imaginary lines that run from the North Pole to the South Pole and are used to measure longitude, which indicates how far east or west a location is from the Prime Meridian. Each meridian is significant because it helps in identifying specific locations on the Earth’s surface in relation to the central line of zero degrees longitude.

While parallels are horizontal lines that run east to west and represent latitude, meridians serve the specific function of demarcating geographic positions in a north-south direction. Understanding this distinction is crucial for navigating and interpreting maps accurately.