abat-vent
noun
ˌäˌbäˈväⁿ,
F ȧbȧväⁿ
plural abat-vents
-äⁿz,
F -äⁿ
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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Merriam-Webster unabridged
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