water seal

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noun

a small amount of water contained in the trap of a drain to prevent the passage of foul smells

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Words nearby water seal

Waters, water sapphire, watersaver, waterscape, waterscorpion, water seal, watershed, water shield, water shrew, water-sick, waterside

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

How to use water seal in a sentence

To make a trap with what is known as a water-seal, the U pipe is turned into an S fallen forward, .
The Library of Work and Play: Housekeeping|Elizabeth Hale Gilman
These ash-pits are themselves provided with an overflow consisting of a siphon-tube forming a water-seal.
Gas-Engines and Producer-Gas Plants|R. E. Mathot
Both tubes were connected to a water seal bottle, and the dressing was applied.
Warren Commission (4 of 26): Hearings Vol. IV (of 15)|The President's Commission on the Assassination of President Kennedy
At S and T are glands which provide a water seal against the inleakage of air and the outleakage of steam.
Steam Turbines|Hubert E. Collins

The water seal in the traps may evaporate, and thus give direct sewer-air connection with the house.
Convenient Houses|Louis Henry Gibson