| 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. |