a telescope mounting that allows motion of the telescope about a vertical axis (in azimuth) and a horizontal axis (in altitude)
WordReference Random House Unabridged Dictionary of American English © 2025
altaz′imuth mount′ing,
- Astronomya mounting with two axes, to allow movement in both horizontal and vertical planes, used with telescopes, antennas, and precise surveying instruments.
- 1875–80
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