abat-vent

noun
\ˌäˌbäˈväⁿ, F ȧbȧväⁿ\
plural abat-vents\-​äⁿz, F -​äⁿ \

Definition of abat-vent 

1 : a series of sloping boards used (as in a belfry light) to break the wind without obstructing the passage of air or sound

2 : a sloping roof (as of a penthouse)

3 : a metal chimney cap

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First Known Use of abat-vent

1860, in the meaning defined at sense 1

History and Etymology for abat-vent

borrowed from French, literally, “(it) strikes down (abat) the wind (vent),” from abattre “to strike down” + vent “wind,” going back to Old French, going back to Latin ventus

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The first known use of abat-vent was in 1860

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