altazimuth
(æltˈæzɪmʌθ)
[f. alt. for altitude + azimuth.]
An instrument, invented by Prof. Airy, for determining the altitude and azimuth of a heavenly body.
| 1860 Dunkin Handbk. Astron. §49 The Greenwich altazimuth instrument. 1868 Lockyer Elem. Astron. §523 To make an observation with the altazimuth. 1876 Chambers Astron. 640 A form of altazimuth mounting for Newtonian Reflectors. |