A nozzle or similar fixture through which the blast is delivered to the interior of a blast furnace, or to the fire of a forge(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "tuyere" in a sentence
"The tuyere, which is fitted to a wooden conduit of square section that runs along the back of the masonry, is placed in the axis of the cadinhes and enters the masonry at a few centimeters from the bottom in such away that its nozzle comes just flush with the surface of the refractory lining."
"Air is forced through this hole, called a "tuyere" (Figure 48) by means of"
"Limbo yielded "sherds of the Early Iron Working (EIW) tradition, several tonnes of slag, and tuyere fragments.""