a condition of hypersensitivity to proteins or other substances, requiring previous
to the allergenic substance and resulting in shock
or other physical reactions
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'anaphylaxis'ModL < Gr ana-, intens. + phylaxis, a guarding < phylassein, to guard