pilewort

/ˈpaɪlwɜːrt/
noun
  1. A small plant (Ranunculus ficaria, also called lesser celandine) with yellow flowers and heart-shaped leaves, traditionally used to treat hemorrhoids (piles).
    • The bright yellow petals of pilewort can carpet a woodland floor in March.
    • Herbalists once used pilewort to make ointments for skin problems.
    • Pilewort grows in damp, shady spots and blooms in early spring.
Synonyms
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