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The Collaborative International Dictionary of English v.0.48 (gcide)

Olfactory \Ol*fac"to*ry\, n.; pl. {Olfactories}.
An olfactory organ; also, the sense of smell; -- usually in
the plural.
[1913 Webster]


Olfactory \Ol*fac"to*ry\, a. [L. olfactus, p. p. of olfacere to
smell; olere to have a smell facere to make. See {Odor},
and {Fact}.] (Physiol.)
Of, pertaining to, or connected with, the sense of smell; as,
the olfactory nerves; the olfactory cells.
[1913 Webster]

{Olfactory organ} (Anat.), an organ for smelling. In
vertebrates the olfactory organs are more or less
complicated sacs, situated in the front part of the head
and lined with epithelium innervated by the olfactory (or
first cranial) nerves, and sensitive to odoriferous
particles conveyed to it in the air or in water.
[1913 Webster]