Meridiems, which refers to the imaginary circles on the Earth's surface that pass through both its poles and any given point on the surface, can also be called meridians or lines of longitude. These lines help us measure distance and time zones around the world. Additionally, they aid in navigation and are used as coordinates for mapping the Earth's surface features and locations. Meridian lines are used in various fields, including geography, cartography, and earth sciences, making it important to know the different synonyms for the term. Other terms used for meridiems include longitudinal lines, longitude circles, and prime meridians.