The Collaborative International Dictionary of English v.0.48:

Puffin \Puf"fin\ (p[u^]f"f[i^]n), n. [Akin to puff.]
   1. (Zool.) An arctic sea bird Fratercula arctica) allied to
      the auks, and having a short, thick, swollen beak, whence
      the name; -- called also bottle nose, cockandy,
      coulterneb, marrot, mormon, pope, and sea
      parrot.
      [1913 Webster]

   Note: The name is also applied to other related species, as
         the horned puffin (Fratercula corniculata), the
         tufted puffin (Lunda cirrhata), and the razorbill.
         [1913 Webster]

   Manx puffin, the Manx shearwater. See under Manx.
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   2. (Bot.) The puffball.
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   3. A sort of apple. [Obs.] --Rider's Dict. (1640).
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The Collaborative International Dictionary of English v.0.48:

Manx shearwater \Manx shearwater\ prop. n. (Zool.),
   A small black-and-white oceanic bird (Puffinus puffinus, or
   Puffinus anglorum), common in the Eastern North Atlantic.
   Called also Manx petrel, Manx puffin. It is avariety of
   shearwater. It was formerly abundant in the Isle of Man.
   [1913 Webster]