n.
Pronunciation: ' näs-tr ə l
Function: noun
Etymology: Middle English nosethirl, from Old English nosthyrl, from nosu nose + thyrel hole; akin to Old English thurh through
Date: before 12th century
1 : either of the external nares broadly : either of the nares with the adjoining passage on the same side of the septum
2 : either fleshy lateral wall of the nose