plural of washing bottle

(chemistry) A bottle fitted with glass tubes passing through the cork, so that on blowing into one of the tubes a stream of water issuing from the other may be directed upon anything to be washed or rinsed, as a precipitate upon a filter, etc.

plural of wash bottle

A bottle partially filled with some liquid through which gases are passed for the purpose of purifying them, especially by removing soluble constituents. / A washing bottle.