tooth·wort 
(tthwûrt′, -wôrt′)
(tthwûrt′, -wôrt′)n.
1. Any of several eastern North American plants of the genus Cardamine of the mustard family, such as crinkleroot, having fibrous or fleshy rhizomes and palmately divided leaves.
2. A Eurasian plant (Lathraea squamata) of the figwort family, having scaly cream-colored or pink stems and pinkish flowers.
[From the toothlike divisions of the underground stems . Sense 2, from its tooth-shaped scales .]