Definition of "waterweed" [wa•ter•weed]

• Any of various submersed aquatic herbs of the genus Elodea, native to the New World, having opposite or whorled one-nerved narrow leaves and small axillary flowers. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "She had dragged a little waterweed from under the ice and was now being deprived of it by her drake."
• "Slippery as waterweed, that's what Jamie said about my-"
• "Un Mauvais Quart d'Heure After Another I delicately removed a strand of still-damp waterweed from my sleeve and placed it squarely in the center of the blotter."