The Collaborative International Dictionary of English v.0.48:

Flutist \Flut"ist\, n. [Cf. F. fl[^u]tiste.]
   A performer on the flute; a flautist. --Busby.
   [1913 Webster]

   2. To move with quick vibrations or undulations; as, a sail
      flutters in the wind; a fluttering fan.
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   3. To move about briskly, irregularly, or with great bustle
      and show, without much result.
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            No rag, no scrap, of all the beau, or wit,
            That once so fluttered, and that once so writ.
                                                  --Pope.
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   4. To be in agitation; to move irregularly; to flucttuate; to
      be uncertainty.
      [1913 Webster]

            Long we fluttered on the wings of doubtful success.
                                                  --Howell.
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            His thoughts are very fluttering and wandering. --I.
                                                  Watts.
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WordNet (r) 3.0 (2006):

flutist
    n 1: someone who plays the flute [syn: flutist, flautist,
         flute player]