The Collaborative International Dictionary of English v.0.48:

Difference \Dif"fer*ence\, v. t. [imp. & p. p. Differenced; p.
   pr. & vb. n. Differencing.]
   To cause to differ; to make different; to mark as different;
   to distinguish.
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         Thou mayest difference gods from men.    --Chapman.
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         Kings, in receiving justice and undergoing trial, are
         not differenced from the meanest subject. --Milton.
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         So completely differenced by their separate and
         individual characters that we at once acknowledge them
         as distinct persons.                     --Sir W.
                                                  Scott.
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