\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.
{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.

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