Source : Webster's Revised Unabridged Dictionary (1913)

Floss \Floss\, n.
   A body feather of an ostrich. Flosses are soft, and gray from
   the female and black from the male.

Floss \Floss\, n. [Cf. G. floss a float.]
   1. A small stream of water. [Eng.]

   2. Fluid glass floating on iron in the puddling furnace,
      produced by the vitrification of oxides and earths which
      are present.

   {Floss hole}.
      (a) A hole at the back of a puddling furnace, at which the
          slags pass out.
      (b) The tap hole of a melting furnace. --Knight.

Floss \Floss\ (?; 195), n. [It. floscio flabby, soft, fr. L.
   fluxus flowing, loose, slack. See {Flux}, n.]
   1. (Bot.) The slender styles of the pistillate flowers of
      maize; also called {silk}.

   2. Untwisted filaments of silk, used in embroidering.

   {Floss silk}, silk that has been twisted, and which retains
      its loose and downy character. It is much used in
      embroidery. Called also {floxed silk}.

   {Floss thread}, a kind of soft flaxen yarn or thread, used
      for embroidery; -- called also {linen floss}, and {floss
      yarn}. --McElrath.

Source : WordNet®

floss
     n 1: a soft loosely twisted thread used in embroidery
     2: a soft thread for cleaning the spaces between the teeth
        [syn: {dental floss}]
     v : use dental floss to clean; "floss your teeth after every
         meal"