Definition of pewterwort in US English:

pewterwort

noun

archaic
  • The rough horsetail, Equisetum hyemale.

Origin

Late 16th century; earliest use found in John Gerard (c1545–1612), herbalist. From pewter + wort, so called on account of its use in polishing pewter and other utensils.

Pronunciation

pewterwort

/ˈpjuːtəwəːt/