ol ‧ fac ‧ to ‧ ry /ɒlˈfækt ə ri $ ɑːl-, oʊl-/ BrE AmE adjective [only before noun] technical
[ Date: 1600-1700 ; Language: Latin ; Origin: olfactorius , from olfacere 'to smell' , from olere 'to smell' + facere 'to do' ]
connected with the sense of smell:
the olfactory cells in the nose