Medical Definition of rainbow
slang : a combination of the sodium derivatives of amobarbital and secobarbital in a blue and red capsule
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Dictionary: Definition of "rainbow" Thesaurus: All synonyms and antonyms for "rainbow" Spanish Central: Translation of "rainbow" Nglish: Translation of "rainbow" for Spanish speakers Britannica English: Translation of "rainbow" for Arabic speakers Britannica.com: Encyclopedia article about "rainbow"
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