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Antihistamine vs Undefined - What's the difference?

antihistamine | undefined |

As a noun antihistamine

is a drug or substance that counteracts the effects of a histamine commonly used to alleviate the symptoms of hay fever and other allergies.

As an adjective undefined is

lacking a definition or value.

antihistamine

English

(wikipedia antihistamine)

Noun

(en noun)
  • A drug or substance that counteracts the effects of a histamine. Commonly used to alleviate the symptoms of hay fever and other allergies.

    • Hyponyms

    * See also

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined