The Collaborative International Dictionary of English v.0.48:

Skiff \Skiff\, n. [F. esquif, fr. OHG. skif, G. schiff. See
   Ship.]
   A small, light boat.
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         The pilot of some small night-foundered skiff.
                                                  --Milton.
   [1913 Webster]

   Skiff caterpillar (Zool.), the larva of a moth (Limacodes
      scapha); -- so called from its peculiar shape.
      [1913 Webster]