ˈnä]strəl sometimes ˈnȯ] or ](ˌ)stril\ noun
( -s )
Etymology: Middle English nostrill, nosethirl, from Old English nosterl, nosthyrl, nosthyrel, from nosu nose + thyrel hole — more at nose , thirl
1.
a. : an external naris ; broadly : a naris with the adjoining passage on the same side of the nasal septum : the anterior part of a nasal fossa with its naris
b. : the fleshy lateral wall of the nose : a nasal ala
2. : a small hole for passage of combustion air or waste gas in any of various industrial furnaces