GNU Collaborative International Dictionary of English

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1.       
   ‖Tuyère (?), n. [F.; akin to tuyau a pipe; of Teutonic origin.  Cf. Tweer, Tewel.] A nozzle, mouthpiece, or fixture through which the blast is delivered to the interior of a blast furnace, or to the fire of a forge. [Corruptly written also tweer, and twier.]
   
   [1913 Webster]
   
   Tuyère arch, the embrasure, in the wall of a blast furnace through which the tuyère enters.
   
   [1913 Webster]