Agent noun of the verb, to water; one who waters.(noun)
A device used for watering.(noun)
A device from which livestock or poultry may drink.(noun)
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Use "waterer" in a sentence
"I once shot a hole in a galvanized steel chicken waterer with one of those 65 gr SSS .22 rounds while shooting at a possum in the hen house through a nopen access door."
"Darn thing went clean through the now deceased possum and both sides of the waterer."
"If there are automatic waterers, the staff will check to make sure nobody has made hay soup and/or pooped in his waterer."