What is "floss hole"

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.

   1. A hole at the back of a puddling furnace, at which the slags pass out.

   2. The tap hole of a melting furnace.
      --Knight.