A hole for the escape of gas or air.

synonyms: blowhole, vent, vent-hole.

Roget 351: air pipe, air tube; airhole^†, blowhole, breathinghole^†, venthole; shaft, flue, chimney, funnel, vent, nostril, nozzle, throat, weasand^†, trachea; bronchus, bronchia [Med.]; larynx, tonsils, windpipe, spiracle; ventiduct^†, ventilator; louvre, jalousie, Venetian blinds; blowpipe etc. (wind) 349; pipe etc. (tube) 260; jhilmil^†; smokestack.    screen, window screen.   ' artificial lung, iron lung, heart and lung machine.    ... show more

Dutch: gietgal, tochtgat, trekgat
Polish: odpowietrznik, odpowietrzacz