Source : Webster's Revised Unabridged Dictionary (1913)

Finnan haddie \Fin"nan had"die\ [See {Haddock}.]
   Haddock cured in peat smoke, originally at Findon (pron.
   f[i^]n"an), Scotland. the name is also applied to other kinds
   of smoked haddock. [Written also {finnan haddock}.]

Source : WordNet®

finnan haddock
     n : haddock usually baked but sometimes broiled with lots of
         butter [syn: {finnan haddie}, {finnan}, {smoked haddock}]