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olfaction (n.)

"sense of smell, faculty of smelling," 1846, noun of action from Latin olfactus, past participle of olfacere "to smell, get the smell of" (transitive), from olere "to emit a smell" (see odor) + facere "to make" (from PIE root *dhe- "to set, put").

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Definitions of olfaction from WordNet

olfaction (n.)
the faculty that enables us to distinguish scents;
Synonyms: smell / sense of smell / olfactory modality
From wordnet.princeton.edu