The Collaborative International Dictionary of English v.0.48:

Pigeonwing \Pi"geon*wing`\, n.
   1. A wing of a pigeon, or a wing like it.
      [Webster 1913 Suppl.]

   2. An old mode of dressing men's side hair in a form likened
      to a pigeon's wings; also, a wig similarly shaped.
      [Webster 1913 Suppl.]

   3. (Dancing) A fancy step executed by jumping and striking
      the legs together; as, to cut a pigeonwing.
      [Webster 1913 Suppl.]

   4. A certain fancy figure in skating.
      [Webster 1913 Suppl.]

   5. (Tempering) A color, brown shaded with purple, coming
      between dark brown and light blue in the table of colors
      in drawing the temper of hardened steel.
      [Webster 1913 Suppl.]