altazimuth

[al-taz-uh-muhth]
noun Astronomy.
an instrument for determining both the altitude and the azimuth of a heavenly body.

Origin:
1855–60; alt(itude) + azimuth

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World English Dictionary
altazimuth (ælˈtæzɪməθ)
 
n
an instrument for measuring the altitude and azimuth of a celestial body by the horizontal and vertical rotation of a telescope
 
[C19: from alt(itude) + azimuth]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Adjustable tripod and altazimuth mount with micro-adjusting controls make it exceptionally easy to use.
Modern computerized altazimuth telescopes track well, even at high powers.
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