The Collaborative International Dictionary of English v.0.48:

Ingraft \In*graft"\, v. t. [imp. & p. p. Ingrafted; p. pr. &
   vb. n. Ingrafting.] [Written also engraft.]
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   1. To insert, as a scion of one tree, shrub, or plant in
      another for propagation; as, to ingraft a peach scion on a
      plum tree; [figuratively], to insert or introduce in such
      a way as to make a part of something.
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            This fellow would ingraft a foreign name
            Upon our stock.                       --Dryden.
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            A custom . . . ingrafted into the monarchy of Rome.
                                                  --Burke.
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   2. To subject to the process of grafting; to furnish with
      grafts or scions; to graft; as, to ingraft a tree.
      [1913 Webster]