from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A freshwater plant (Pontederia cordata) of eastern North America, having heart-shaped leaves with long petioles and spikes of violet-blue flowers.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several freshwater plants, of the genus Pontederia, that have heart-shaped leaves
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. American plant having spikes of blue flowers and growing in shallow water of streams and ponds
pickerel + weed (Wiktionary)