What is the meaning of "antidote"?

The term "antidote" specifically refers to a substance that counteracts the effects of a poison. In medical contexts, it is used to neutralize or diminish the toxicity of a harmful substance that has been ingested or introduced into the body. Antidotes can vary widely depending on the type of toxin and how it affects the body, making them a critical component of toxicology and emergency medicine.

The choice is particularly accurate because it directly reflects the primary definition and use of the word. While preventive measures against illness, herbal supplements, and various forms of therapy have their own relevance in health contexts, they do not align with the specific function and definition of an antidote. Thus, recognizing "antidote" as a remedy for a poison captures its essence and application most precisely.