any of several North American, aquatic plants of the genus Proserpinaca, having pinnately dissected leaves either above or below the water.
Origin of mermaid weed
An Americanism dating back to 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for mermaid weed
Historical Examples of mermaid weed
One of the most common plants is the mermaid-weed (Proserpinaca).