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 for Celestial poles
From The Collaborative International Dictionary of English v.0.48 :

  Pole \Pole\, n. [L. polus, Gr. ? a pivot or hinge on which
     anything turns, an axis, a pole; akin to ? to move: cf. F.
     1. Either extremity of an axis of a sphere; especially, one
        of the extremities of the earth's axis; as, the north
        [1913 Webster]
     2. (Spherics) A point upon the surface of a sphere equally
        distant from every part of the circumference of a great
        circle; or the point in which a diameter of the sphere
        perpendicular to the plane of such circle meets the
        surface. Such a point is called the pole of that circle;
        as, the pole of the horizon; the pole of the ecliptic; the
        pole of a given meridian.
        [1913 Webster]
     3. (Physics) One of the opposite or contrasted parts or
        directions in which a polar force is manifested; a point
        of maximum intensity of a force which has two such points,
        or which has polarity; as, the poles of a magnet; the
        north pole of a needle.
        [1913 Webster]
     4. The firmament; the sky. [Poetic]
        [1913 Webster]
              Shoots against the dusky pole.        --Milton.
        [1913 Webster]
     5. (Geom.) See Polarity, and Polar, n.
        [1913 Webster]
     Magnetic pole. See under Magnetic.
     Poles of the earth, or Terrestrial poles (Geog.), the two
        opposite points on the earth's surface through which its
        axis passes.
     Poles of the heavens, or Celestial poles, the two
        opposite points in the celestial sphere which coincide
        with the earth's axis produced, and about which the
        heavens appear to revolve.
        [1913 Webster] Poleax

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