A nose is "the prominence on the face which is the organ of scent, and the emunctory of the brain."
emunctory, e-mungk′tor-i, n. an organ of the body that carries off waste: an excretory duct.
emunctory e·munc·to·ry (ĭ-mŭngk'tə-rē)
Serving to carry waste out of the body; excretory. n.
An organ or duct that removes or carries waste from the body.