Anaphylaxis Definition

ănə-fə-lăksĭs
noun
A condition of hypersensitivity to proteins or other substances, requiring previous exposure to the allergenic substance and resulting in shock or other physical reactions.
Webster's New World
A sudden, usually systemic allergic reaction, characterized by vasodilation resulting in decreased blood pressure, smooth muscle contraction resulting in shortness of breath, and hives, caused by hypersensitivity induced by a secondary exposure to a foreign substance, such as a drug or protein, after an initial sensitizing exposure.
American Heritage Medicine
Extreme sensitivity to a substance such as a foreign protein or drug.
Wiktionary

A severe and rapid systemic allergic reaction to an allergen, causing a constriction of the trachea, preventing breathing; anaphylactic shock.

Wiktionary

Other Word Forms of Anaphylaxis

Noun

Singular:
anaphylaxis
Plural:
anaphylaxes

Origin of Anaphylaxis

  • ana– (pro)phylaxis

    From American Heritage Dictionary of the English Language, 5th Edition

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