/ Dictionary / Index O oak-leaf hydrangea: Meaning and Definition of Find definitions for: oak'-leaf hydran'gea Pronunciation: (ōk'lēf"), [key] a shrub, Hydrangea quercifolia, of the southeastern U.S., having lobed leaves and pyramidal clusters of white flowers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oak leaf cluster oak leather Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language