Definition of pepper root in English:

pepper root

noun

  • 1The root of a pepper of the genus Piper; especially that of the Polynesian P. methysticum, used to make kava.

  • 2US any of several plants of the genus Cardamine (formerly called Dentaria), especially C. diphylla, whose roots have a pungent taste like watercress.

Origin

Mid 17th century; earliest use found in Mercurius Politicus.