• (British) IPA: /ˈhɛlɪbɔː/
  • (America) IPA: /ˈhɛlɪbɔːɹ/

hellebore (plural hellebores)

  1. Any of the common garden flowering plants of the genus Helleborus, in family Ranunculaceae, having supposed medicinal properties.
    • 1998, Plinio Prioreschi, A History of Medicine, Volume III: Roman Medicine, page 122 ↗,
      Then the physician would use the king of remedies, the powerful one, hellebore: […] We suspect that after a sufficient number of administrations of hellebore the patient, if he had not done so before, would declare himself cured.
  2. A toxic extract of certain false hellebores (Veratrum album or Veratrum viride), formerly used as a pesticide.
    • 1915 July 14, Leland Ossian Howard, Robert Harris Hutchison, House Flies, US Department of Agriculture, Farmers' Bulletin No. 679, page 15 ↗,
      Of the numerous substances tried, the one which seems best to fulfill these conditions is powdered hellebore. Some of the powdered hellebore in use is prepared from the roots of a plant which botanists know as Veratrum viride, and which is popularly known as Indian polk or itch weed.
  • (any species of genus Helleborus) Christmas rose (particularly Helleborus niger)

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