water key

noun

a lever to drain saliva from a brass musical instrument, as the trombone.

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Nearby words

water hyacinth, water ice, water intoxication, water jacket, water jump, water key, water leaf, water lemon, water lettuce, water level, water lily

Also called spit valve.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019