monopode

plural monopodes

1. Someone or something with one foot; a monopod.

   Then Timofey’s torso was bared, and to it Belochkin pressed the icy nudity of his ear and the sandpapery side of his head. Like the flat sole of some monopode, the ear ambulated all over Timofey’s back and chest, gluing itself to this or that patch of skin and stomping on to the next.

   1957 March 7, Vladimir Nabokov, chapter 1.2, in Pnin, Heinemann, page 22