Nose

A nose was an sensory organ associated with smell.

The Fourth Doctor thought his nose was an improvement over that of his prior incarnation, but was unsure whether his ears were as well. (TV: Robot)

Barcelonian dogs had no noses. The Ninth Doctor wished to take Rose Tyler to the planet Barcelona to see them. (TV: The Parting of the Ways)

The Tenth Doctor helped Natasha, a model, regain her nose after it was stolen by Mitra Ashkanzai. (PROSE: The Pictures of Emptiness)

When Amy, Rory and River Song exited the TARDIS after it landed in the Oval Office, the Eleventh Doctor introduced them to President Richard Nixon as his top operatives: the Legs, the Nose, and Mrs Robinson. (TV: The Impossible Astronaut)

When the Curator said "Who knows?" to the Eleventh Doctor, he tapped the side of his own nose when he said the word "nose". (TV: The Day of the Doctor) This was a mannerism also displayed by the Fourth Doctor. (TV: Robot, The Brain of Morbius, The Creature from the Pit )