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anaphylactic shock
an·a·phy·lac·tic shock


noun 
Definition:
 
allergic reaction: a sudden severe and potentially fatal allergic reaction in somebody sensitive to a substance, marked by a drop in blood pressure, difficulty in breathing, itching, and swelling
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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