Definition of palsywort in US English:

palsywort

noun

  • 1British regional. The cowslip, Primula veris. Now rare.

  • 2United States regional. The marsh marigold, Caltha palustris.

Origin

Late 16th century; earliest use found in John Gerard (c1545–1612), herbalist. From palsy + wort, after post-classical Latin herba paralysis or Middle French herbe paralyse, erbe a paralisie; compare quot. 1597 at sense 1.