Source : Webster's Revised Unabridged Dictionary (1913)

Merlin \Mer"lin\, n. [OE. merlion, F. ['e]merillon; cf. OHG.
   smirl, G. schmerl; prob. fr. L. merula blackbird. Cf.
   {Merle}.] (Zo["o]l.)
   A small European falcon ({Falco lithofalco}, or {F.
   [ae]salon}).

Source : WordNet®

Merlin
     n 1: (Arthurian legend) the magician who acted as King Arthur's
          advisor
     2: small falcon of Europe and America having dark plumage with
        black-barred tail; used in falconry [syn: {pigeon hawk}, {Falco
        columbarius}]

Source : Free On-Line Dictionary of Computing

Merlin
     
        {OS/2}