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wild hydrangea

American

noun

a shrub, Hydrangea arborescens, of the saxifrage family, common throughout the eastern half of the U.S., having egg-shaped leaves and a rounded cluster of white flowers.

An Americanism dating back to 1885–90

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023