/ Dictionary / Index M mermaid weed: Meaning and Definition of Find definitions for: mer'maid weed" Pronunciation: [key] any of several North American, aquatic plants of the genus Proserpinaca, having pinnately dissected leaves either above or below the water. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mermaid Tavern merman Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language