society > travel > travel by water > vessel, ship, or boat > equipment of vessel > other equipment of vessel > [noun] > ship's pumps (12)
A form of bilge-pump with the piston so constructed as not to require a valve: see quot.
a pump to draw off the bilge-water.
(a) the leader of a gang of farm-labourers; (b) a back-breaking task, etc. (cf. back, n.1 24a and affix 1b); also in extended use.