The Collaborative International Dictionary of English v.0.48:

Remotion \Re*mo"tion\ (r?-m?"sh?n), n. [L. remotio. See
   Remove.]
   1. The act of removing; removal. [Obs.]
      [1913 Webster]

            This remotion of the duke and her
            Is practice only.                     --Shak.
      [1913 Webster]

   2. The state of being remote; remoteness. [R.]
      [1913 Webster]

            The whitish gleam [of the stars] was the mask
            conferred by the enormity of their remotion. --De
                                                  Quincey.
      [1913 Webster]

WordNet (r) 3.0 (2006):

remotion
    n 1: the act of removing; "he had surgery for the removal of a
         malignancy" [syn: removal, remotion]