bladdernut
noun
blad·der·nut
ˈbla-dər-ˌnət
: any of a genus (Staphylea of the family Staphyleaceae, the bladdernut family) of ornamental shrubs or small trees with panicles of small white flowers followed by inflated capsules
also
: one of the capsules
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Merriam-Webster unabridged
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