nasalis
noun
na·sa·lis
| \ nā-ˈzā-ləs
, -ˈsā-
\
, -ˈsā-
\
Medical Definition of nasalis
: a small muscle on each side of the nose that constricts the nasal aperture by the action of a triangular transverse portion which draws the lateral part of the aperture upward and a quadrangular alar portion which draws it downward