pump box

noun

1. a chamber of a pump in which a piston operates.

Word History and Origins

Origin of pump box¹

First recorded in 1690–1700

Example Sentences

They will also install an insulation tent over the new pump box to help regulate temperature.

From Scientific American

When we got her on a heel, we tried the pumps, not being able to do it before, for our careful carpenter had ne'er a pump box rigged or fit to work; so, had it not been for the kind assistance of the man of war's people, who came off as soon as they heard of our misfortune, & put our guns on board the prize, we must certainly have sunk, most of our own hands being ashore.

From Project Gutenberg