The Collaborative International Dictionary of English v.0.48:

outward-moving \outward-moving\ adj.
   moving or directed away from center, especially when spinning
   or traveling in a curve.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

outward-moving
    adj 1: moving or directed away from center, especially when
           spinning or traveling in a curve