[tromp] 
| Metallurgy. a device formerly used for inducing a blast of air upon the hearth of a forge by means of a current of falling water. |
| trompe (trŏmp) n. An apparatus in which water falling through a perforated pipe entrains air into and down the pipe to produce an air blast for a furnace or forge. [French, from Old French, trumpet; see trump2.] |