Definition

Noun: 1. A poisonous substance, specifically arsenic trioxide, used to kill rats: The word "ratsbane" is an archaic term that refers to a potent poison, historically employed as a rodenticide. Its core meaning is a substance that is lethal to rats.

Examples of Usage

• Noun:
  • In the 18th century, ratsbane was a common, though dangerous, solution for rodent infestations.
  • The old apothecary jar was labeled "Ratsbane," warning of its deadly contents.
  • Historical novels sometimes mention ratsbane as a method of murder, due to its potency and availability in past eras.

Advanced Usage

• Figurative/Archaic Use: In older texts, "ratsbane" can be used as a curse or an exclamation of disgust or frustration, similar to "poison!" or "plague!"
  • "Ratsbane! My plans are ruined!" cried the villain in the play.

Variants and Related Words

• Arsenic trioxide (n): The modern chemical name for the compound historically called ratsbane.
• Arsenic (n): The element from which the poison is derived; a broader term for poisonous compounds containing this element.
• Rodenticide (n): The general term for any substance used to kill rodents.
• Pesticide (n): A broader category of substances used to destroy pests, which includes rodenticides.

Synonyms

• Poison
• Rodenticide
• Arsenic (in context)
• Toxin

Notes on Meaning

• Primary Meaning: The dominant and historical meaning is a poison for rats, specifically arsenic trioxide (As₂O₃).
• Contextual Meaning: In modern contexts, the word is almost exclusively found in historical, literary, or academic discussions about past poisons and pest control methods. It is not a term used in contemporary pest management.

Noun

1. a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer