/älˈfakt(ə)rē/ /ōl-/
Adjective
1. Concerning the sense of smell. (wiktionary.org)
2. Of, relating to, or contributing to the sense of smell. (The American Heritage® Dictionary of the English Language, Fourth Edition )
Word origin: From Latin olfactorius, from olfact-, past participle stem of olfacere “to get the smell of, sniff,” from olere “emit a smell, give off a smell of” + facere “make”