noun ·3 syllables ·Moderate ·College level

Definitions

Noun

1. 1
   A substance that induces an immune response, usually foreign (nonself) but not always so.
2. 2
   any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies) wordnet

Synonyms

All synonyms

acquired immunityactive immunityagglutininallergenanaphylactinantiantibody

Antonyms

All antonyms

Abantibodyigimmune globulin

Example

More examples

"If you only have the B antigen, your blood is type B."

Etymology

From French antigène, from anti- + gène.

Related phrases

Australia antigenDuffy antigenGoodpasture's antigenantigen-presenting cellbroad antigenchimeric antigen receptorgroup-specific antigenhistocompatibility antigenhuman leukocyte antigenprostate-specific antigenrapid antigen testself-antigen

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.