a North American deciduous shrub of the genus Physocarpus that has peeling bark and small white flowers
ninebark in American English
(ˈnainˌbɑːrk)
noun
any of several shrubs belonging to the genus Physocarpus, of the rose family, having bark that separates into thin layers
Word origin
[1775–85, Amer.; nine + bark2]This word is first recorded in the period 1775–85. Other words that entered Englishat around the same time include: Americanism, backfire, cabriole, interference, waltz