Dictionary.com

antigen

[ an-ti-juhn, -jen ]
/ ˈæn tɪ dʒən, -ˌdʒɛn /
Save This Word!

noun

Immunology. any substance that can stimulate the production of antibodies and combine specifically with them.
Pharmacology. any commercial substance that, when injected or absorbed into animal tissues, stimulates the production of antibodies.
antigens of a particular type collectively.

QUIZZES

QUIZ YOURSELF ON “ITS” VS. “IT’S”!

Apostrophes can be tricky; prove you know the difference between it’s and its in this crafty quiz!
Question 1 of 12
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of antigen

First recorded in 1905–10; anti(body) + -gen
an·ti·gen·ic [an-ti-jen-ik], /ˌæn tɪˈdʒɛn ɪk/, adjectivean·ti·gen·i·cal·ly, adverban·ti·ge·nic·i·ty [an-ti-juh-nis-i-tee], /ˌæn tɪ dʒəˈnɪs ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for antigen

antigen
/ (ˈæntɪdʒən, -ˌdʒɛn) /

noun

a substance that stimulates the production of antibodies
antigenic, adjectiveantigenically, adverb
C20: from anti (body) + -gen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for antigen

antigen
[ ăntĭ-jən ]

n.

Any of various substances, including toxins, bacteria, and the cells of transplanted organs, that when introduced into the body stimulate the production of antibodies.allergen immunogen
an′ti•genic (-jĕnĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for antigen

antigen
[ ăntĭ-jən ]

A substance that stimulates the production of an antibody when introduced into the body. Antigens include toxins, bacteria, viruses, and other foreign substances. Compare antibody. See Note at blood type.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
What's This Word?