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altazimuth

alt·az·i·muth [ al tázməth, al tázzəməth ] (plural alt·az·i·muths)


noun 
Definition:
 
1. telescope: an instrument, incorporating a telescope that can move vertically and horizontally, used to measure the altitude and azimuth of an astronomical object

2. surveying instrument: an instrument similar to a theodolite used in surveying to measure horizontal and vertical angles

[Mid-19th century. Blend of altitude + azimuth]
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