Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

anaphylatoxin

play
noun an·a·phyl·a·tox·in \ˌan-ə-ˌfil-ə-ˈtäk-sən\

Medical Definition of anaphylatoxin

  1. :  any of several peptides that promote acute inflammation and mediation of the immune response following activation of complement <In the second type of [anaphylactic] reaction, immune complexes or other agents activate the complement cascade, resulting in the formation of anaphylatoxins (e.g., the complement protein fragment C3a and C5a), which can trigger the release of mediators from mast cells and basophils directly.—Bruce S. Bochner, The New England Journal of Medicine, 20 June 1991>




Seen and Heard

What made you want to look up anaphylatoxin? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by grandiloquent style

Get Word of the Day daily email!