noun
- Circles on the celestial sphere parallel to the horizon, used in astronomy and navigation to measure the altitude of celestial bodies.
Usage: astronomy; navigation; plural of almacantar
Examples
- Astronomers use almacantars to determine the position of stars above the horizon.
- The navigator plotted the ship's course using almacantars and other celestial references.
- Almacantars are essential tools in spherical astronomy for measuring altitude.
- The telescope's grid displayed almacantars to help locate celestial objects.