/ Dictionary / Index H hydrophyllaceous: Meaning and Definition of Find definitions for: hy•dro•phyl•la•ceous Pronunciation: (hī"drō-fi-lā'shus), [key] — adj. belonging to the Hydrophyllaceae, the waterleaf family of plants. Cf. waterleaf family. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrophone hydrophyte Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language