Wiper

[Sarah]

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 ownweight; a kind of cam.

[Sarah]

Entry level position in the engine room of a Merchant Ship of the United States.
Duties include maintaining cleanliness of engine room machinery and gangways, bilge detail, and painting/chipping paint in the engineroom.

[Lizzy Liz]

informal for windscreen wiper