altazimuth
Concise Oxford English Dictionary © 2008 Oxford University Press:
altazimuth /alˈtazɪməθ/
▶noun
- 1 Astronomy a telescope mounting that moves in azimuth (about a vertical axis) and in altitude (about a horizontal axis). Compare with equatorial mount.
- 2 a surveying instrument for measuring vertical and horizontal angles.
'altazimuth' also found in these Oxford entries:

