A pump for water: used humorously of the eyes.(noun)
The Century Dictionary (Public Domain)
Use "water-pump" in a sentence
"As some doubtless already know, this will immediately overheat and cook the water-pump impeller."
"We also try to get past the locks using a cordless drill, pipe wrench, water-pump pliers (channel locks), a reciprocating saw, a crowbar, picking tools (wielded by a local locksmith), and even salt spray."
"The shutdown of Unit 3, which had been running continuously for more than a year, comes just a week after Unit 2 was brought offline for the repair of a water-pump motor."