1. a network of lines representing meridians and parallels on a map or globe
Usage: cartography; geography
2. a grid of fine lines or wires in the eyepiece of an optical instrument used for measurement or positioning
Usage: optics; technical

Examples

• The map’s graticule showed lines of latitude and longitude.
• Students learned to read coordinates using the graticule on their world atlas.
• The surveyor adjusted the telescope’s graticule to take precise measurements.
• Navigation charts include a graticule to help sailors determine their position.
• The microscope’s graticule allowed researchers to measure tiny specimens accurately.
• Cartographers use a graticule as the foundation for creating accurate maps.