noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Of an equatorial mounting, the axis of rotation that is positioned parallel to the axis of the Earth, allowing a telescope to be turned in an hour angle or a right ascension.
2. 2
   A fixed line, usually horizontal, used in polar coordinates and from which an angle coordinate is measured.

Synonyms

All synonyms

pole of the heavens