Source : Webster's Revised Unabridged Dictionary (1913)

Selfsame \Self"same\, a. [Self, a. + same.]
   Precisely the same; the very same; identical.

         His servant was healed in the selfsame hour. --Matt.
                                                  viii. 13.

Source : WordNet®

selfsame
     adj : being the exact same one; not any other:; "this is the
           identical room we stayed in before"; "the themes of his
           stories are one and the same"; "saw the selfsame
           quotation in two newspapers"; "on this very spot"; "the
           very thing he said yesterday"; "the very man I want to
           see" [syn: {identical}, {one and the same(p)}, {selfsame(a)},
            {very(a)}]