1. plural of altazimuth: telescopes or surveying instruments that can move both horizontally and vertically to track celestial objects or measure angles
Usage: astronomy; surveying

Examples

• The observatory installed several new altazimuths for tracking satellites.
• Modern altazimuths use computer control to follow stars across the sky.
• The surveying team used altazimuths to measure precise angles between landmarks.
• Amateur astronomers often prefer altazimuths because they are easier to set up than equatorial mounts.
• The altazimuths at the research facility can automatically compensate for Earth’s rotation.