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lethal substance JUST WRITTEN FOR YOU

/ˈlɛθəl ˈsʌbstəns/ · lethal.sub.stance
noun
  1. A substance capable of causing death or severe harm if ingested, inhaled, or otherwise absorbed. The lab was equipped to handle and dispose of lethal substances safely.
noun
  1. A substance that is poisonous or toxic to a particular organism or group of organisms. The plant's lethal substance made it unpalatable to herbivores.
Did you know? The term 'lethal substance' has been used in various scientific and literary contexts, including in the field of chemistry and in the works of authors like Agatha Christie, who often featured lethal substances as plot devices in her mystery novels.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 17, 2026