Wiper

n.	1.	One who, or that which, wipes.
	2.	Something used for wiping, as a towel or rag.
	3.	(Mach.) A piece generally projecting from a rotating or swinging piece, as an axle or rock shaft, for the purpose of raising stampers, lifting rods, or the like, and leaving them to fall by their own weight; a kind of cam.
	4.	(Firearms) A rod, or an attachment for a rod, for holding a rag with which to wipe out the bore of the barrel.

Noun	1.	wiper - a worker who wipes
	2.	wiper - contact consisting of a conducting arm that rotates over a series of fixed contacts and comes to rest on an outlet Synonyms: contact arm, wiper arm
	3.	wiper - a mechanical device that cleans the windshield Synonyms: windscreen wiper, windshield wiper, wiper blade

pass over, wipe, worker