What is "tuyeres"

Usage examples of "tuyeres".

The hot water that cooled the tuyeres came into it, some fifty yards up--a tumultuous, almost boiling affluent, and the steam rose up from the water in silent white wisps and streaks, wrapping damply about them, an incessant succession of ghosts coming up from the black and red eddies, a white uprising that made the head swim.