Truth Serum Definition
noun
An anesthetic or hypnotic, as thiopental sodium, regarded as tending to make a subject responsive while being questioned.
Webster's New World
(informal, medicine) A psychoactive medication, especially one administered by injection, which supposedly renders a person cooperative and disposed to respond honestly to questions.
Wiktionary
Synonyms:
Other Word Forms of Truth Serum
Noun
Singular:
truth serum
Plural:
truth serums
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