altazimuth

noun

• 1 (also altazimuth mount or mounting) Astronomy a telescope mounting that moves in azimuth (about a vertical axis) and in altitude (about a horizontal axis). Compare with equatorial mount.
• (also altazimuth telescope) a telescope on an altazimuth mounting.

• 2a surveying instrument for measuring vertical and horizontal angles, resembling a theodolite but larger and more precise.