The Collaborative International Dictionary of English v.0.48:

Axial \Ax"i*al\, a.
   1. Of or pertaining to an axis; of the nature of, or
      resembling, an axis; around an axis.
      [1913 Webster]

            To take on an axial, and not an equatorial,
            direction.                            --Nichol.
      [1913 Webster]

   2. (Anat.) Belonging to the axis of the body; as, the axial
      skeleton; or to the axis of any appendage or organ; as,
      the axial bones.
      [1913 Webster]

   Axial line (Magnetism), the line taken by the magnetic
      force in passing from one pole of a horseshoe magnet to
      the other. --Faraday.
      [1913 Webster]

WordNet (r) 3.0 (2006):

axial
    adj 1: of or relating to or resembling an axis of rotation
    2: relating to or attached to the axis; "axial angle" [syn:
       axile, axial]
    3: situated on or along or in the direction of an axis

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "axial":
   ascending, back, back-flowing, backward, centermost, central,
   centralized, centric, centroidal, centrosymmetric, concentrated,
   descending, down-trending, downward, drifting, flowing, fluent,
   flying, geocentric, going, gyrational, gyratory, key, middle,
   middlemost, midmost, mounting, omphalic, passing, pivotal,
   plunging, progressive, reflowing, refluent, regressive,
   retrogressive, rising, rotary, rotational, rotatory, running,
   rushing, sideward, sinking, soaring, streaming, umbilical,
   up-trending, upward