anaphylactic reaction
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anaphylactic shock — n an often severe and sometimes fatal systemic reaction in a susceptible individual upon a second exposure to a specific antigen (as wasp venom or penicillin) after previous sensitization that is characterized esp. by respiratory symptoms,… … Medical dictionary
anaphylactic shock — n. (Med.) a severe form of physiological shock, often having a fatal outcome, caused by an extreme immunological reaction to antigens. It is a severe form of {anaphylaxis[2]}, and is characterized by smooth muscle contraction and capillary… … The Collaborative International Dictionary of English
anaphylactic shock — noun a severe and rapid and sometimes fatal hypersensitivity reaction to a substance (especially a vaccine or penicillin or shellfish or insect venom) to which the organism has become sensitized by previous exposure • Hypernyms: ↑anaphylaxis * *… … Useful english dictionary
reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… … Medical dictionary
anaphylactic shock — anaphylaxis anaphylaxis n. 1. [Gr. ana back, way from + fy laxis security, protection.] 1. (Med.) hypersensitivity (to a protein or drug) resulting from prior contact with a substance. [WordNet 1.5] 2. (Med.) an immediate but transient allergic… … The Collaborative International Dictionary of English
anaphylactic shock — an|a|phy|lac|tic shock [ˌænəfılæktık ˈʃɔk US ˈʃa:k] n [U] medical a very sudden serious physical reaction that is caused by an ↑allergy to something such as nuts, eggs, or the ↑sting of some insects. The reaction causes shock, breathing… … Dictionary of contemporary English
anaphylactic shock — A severe and sometimes life threatening immune system reaction to an antigen that a person has been previously exposed to. The reaction may include itchy skin, edema, collapsed blood vessels, fainting, and difficulty in breathing … English dictionary of cancer terms
anaphylactic shock — noun Date: 1910 an often severe and sometimes fatal systemic reaction in a susceptible individual upon exposure to a specific antigen (as wasp venom or penicillin) after previous sensitization that is characterized especially by respiratory… … New Collegiate Dictionary
anaphylactic shock — Pathol. a severe and sometimes fatal allergic reaction to a foreign substance, esp. a protein, as serum or bee venom, to which an individual has become sensitized, often involving rapid swelling, acute respiratory distress, and collapse of… … Universalium
anaphylactic shock — noun A severe and rapid systemic allergic reaction to an allergen, constricting the trachea and preventing breathing. Syn: anaphylaxis … Wiktionary
