Webster's English Dictionary

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olfactory

ol.fac.to.ry \a:l-'fak-t(*-)re-, o-l-\ aj [L olfactorius, fr. olfactus, pp. 
   of olfacere to smell, fr. (Xole-re to smell + facere to do - more at ODOR, 
   DO : of, relating to, or connected with the sense of smell