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1. Oxford American Dictionary

   polar axis

   • IPA[ˌpōlər ˈaksəs]

   美式

   • n.
     the axis of an equatorially mounted telescope which is at right angles to the declination axis and parallel to the earth's axis of rotation, about which the telescope is turned to follow the apparent movement of celestial objects resulting from the earth's rotation.

   • noun: polar axis, plural noun: polar axes

2. • 更多解釋

   polar axis

   • n.
     the axis of an equatorially mounted telescope which is at right angles to the declination axis ...

   Oxford Dictionary