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

Word History

First Known Use

1578, in the meaning defined above