The Collaborative International Dictionary of English v.0.48:

Counterchange \Coun`ter*change"\ (koun`t[~e]r*ch[=a]nj), v. t.
   [imp. & p. p. Counterchanged (-ch?njd"); p. pr. & vb. n.
   Counterchanging.]
   1. To give and receive; to cause to change places; to
      exchange.
      [1913 Webster]

   2. To checker; to diversify, as in heraldic counterchanging.
      See Counterchaged, a., 2.
      [1913 Webster]

            Witch-elms, that counterchange the floor
            Of this flat lawn with dusk and bright. --Tennyson.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Counterchanged \Coun`ter*changed"\ (-ch?njd"), a.
   1. Exchanged.
      [1913 Webster]

   2. (Her.) Having the tinctures exchanged mutually; thus, if
      the field is divided palewise, or and azure, and cross is
      borne counterchanged, that part of the cross which comes
      on the azure side will be or, and that on the or side will
      be azure.
      [1913 Webster]