Definition of olfactory adjective from the Oxford Advanced Learner's Dictionary

 

olfactory

 adjective
adjective
BrE BrE//ɒlˈfæktəri//
 
; NAmE NAmE//ɑːlˈfæktəri//
 
, NAmE//oʊlˈfæktəri//
 
[only before noun](specialist)
 
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connected with the sense of smell olfactory cells/nerves/organs Word Origin mid 17th cent.: from Latin olfactare (frequentative of olfacere ‘to smell’) + -ory.
See the Oxford Advanced American Dictionary entry: olfactory