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firestop

 - 1 dictionary result

fire⋅stop

[fahyuhr-stop]
–noun
any object built into a building frame to block a concealed hollow space through which a fire might pass from one part of the building to another.

Origin:
1895–1900; Americanism; fire + stop
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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