The Collaborative International Dictionary of English v.0.48:

Interline \In`ter*line"\, v. t. [imp. & p. p. Interlined; p.
   pr. & vb. n. Interlining.] [Pref. inter- + line: cf. LL.
   interlineare, F. interlin['e]er, OF. entreligner.]
   [1913 Webster]
   1. To write or insert between lines already written or
      printed, as for correction or addition; to write or print
      something between the lines of; as, to interline a page or
      a book. --Swift.
      [1913 Webster]

   2. To arrange in alternate lines; as, to interline Latin and
      English. --Locke.
      [1913 Webster]

   3. To mark or imprint with lines.
      [1913 Webster]

            A crooked wrinkle interlines my brow. --Marlowe.
      Interlineal