Dictionary
bit'ter herb'
1. an Old World herb,
Centaurium erythraea, used dried in medicine as a tonic.
2. the turtlehead,
Chelone glabra, used in medicine as a tonic, cathartic, and anthelmintic.
3. Judaism.an herb that tastes bitter, as horseradish, traditionally eaten at the Seder, and serving as a reminder of the Israelites' slavery in Egypt.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.