polar axis

短语

[数][天] 极轴

词形变化

polar axes 复数 polar axes

释义与例句

n.
  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.

    天文
  2. 2.

    A fixed line, usually horizontal, used in polar coordinates and from which an angle coordinate is measured.

    数学