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1. Oxford American Dictionary

   declination axis

   • IPA[ˌdekləˈnāSHən ˈaksəs]

   • n.
     the axis of an equatorially mounted telescope which is at right angles to the polar axis, about which the telescope is turned in order to view points at different declinations but at a constant right ascension.

   • noun: declination axis, plural noun: declination axes

2. • 更多解釋

   declination axis

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

   Oxford Dictionary