We found 65 dictionaries that define the word antigen:

General (22 matching dictionaries)

1. antigen: Merriam-Webster
2. antigen: Oxford Learner's Dictionaries
3. antigen: American Heritage Dictionary of the English Language
4. antigen: Collins English Dictionary
5. antigen: Vocabulary.com
6. Antigen, antigen: Wordnik
7. antigen: Cambridge Advanced Learner's Dictionary
8. antigen: Wiktionary
9. antigen: Webster's New World College Dictionary, 4th Ed.
10. antigen (antigene): The Wordsmyth English Dictionary-Thesaurus
11. antigen: Online Etymology Dictionary
12. Antigen: Wikipedia, the Free Encyclopedia
13. antigen: Rhymezone
14. antigen: FreeDictionary.org
15. antigen: Mnemonic Dictionary
16. antigen: TheFreeDictionary.com
17. antigen: Infoplease Dictionary
18. antigen: Dictionary.com
19. antigen: Longman Dictionary of Contemporary English
20. antigen: Merriam-Webster

Art (1 matching dictionary)

21. Antigen: Health & Beauty Glossary

Business (1 matching dictionary)

22. antigen: Legal dictionary

Computing (1 matching dictionary)

23. antigen: Encyclopedia

Medicine (32 matching dictionaries)

24. antigen: Merriam-Webster Medical Dictionary
25. Dorland's Illustrated Medical Dictionary (No longer online)
26. Antigen: MedTerms.com Medical Dictionary
27. AIDSinfo Glossary (No longer online)
28. antigen: Natural Health glossary
29. Antigen: Allergy Glossary of Terms
30. online medical dictionary (No longer online)
31. Antigen: HIV/AIDS Glossary
32. Cancer Glossary (No longer online)
33. Hepatitis C Information Central (No longer online)
34. antigen: Prostate Cancer Interactive Glossary
35. Allergy Glossary (No longer online)
36. Antigen: Scleroderma
37. Kidney Patient Guide Glossary (No longer online)
38. Multiple Sclerosis Encyclopaedia (No longer online)
39. Antigen: Glossary of Lymphoma Terms
40. Antigen: Breast Cancer Glossary of Medical Terms
41. AIDS Medical Glossary and Drug Chart (No longer online)
42. Antigen: MEDLINE plus Illustrated Medical Encyclopedia
43. antigen: Dictionary of Cancer Terms
44. Antigen: GLOSSARY of BLOOD RELATED TERMS
45. antigen: Parents' Common Sense Encyclopedia
46. Microbial Genetics Glossary (No longer online)
47. Glossary of HIV/AIDS Related Terms (No longer online)
48. A-Z Family health glossary (No longer online)
49. antigen: Medical dictionary
50. University of Maryland Glossary of Medical Terms (No longer online)
51. PERFUSION TECHNOLOGY, OPEN HEART SURGERY AND CARDIOLOGY (No longer online)
52. Vitamin Glossary (No longer online)
53. WeMove Glossary of Terms (No longer online)
54. Antigen: Drug Medical Dictionary
55. Hyperdictionary (No longer online)

Miscellaneous (1 matching dictionary)

56. Glossary of Terrorism Terms (No longer online)

Science (3 matching dictionaries)

57. Drug Discovery and Development (No longer online)
58. Antigen: Biology dictionary
59. AGRICULTURAL AND ENVIRONMENTAL BIOTECHNOLOGY (No longer online)

Tech (4 matching dictionaries)

60. Dairy Glossary (No longer online)
61. GLOSSARY OF DAIRY TERMS (No longer online)
62. Antigen: Beauty & Health Glossary
63. Washington State Definitions and Abbreviations of Vetrinary Terms (No longer online)

(Note: See antigenic as well.)

Definitions from Wiktionary ( ) ▸ noun:  (immunology) A substance that induces an immune response, usually foreign. Similar: antibody, epitope, alloantigen, immunoglobulin, autoantigen, autoantibody, neoantigen, superantigen, immunoglobin, antiglobulin, more... Opposite: antibody, immunoglobulin, receptor, effector, neutralizer Types: protein, polysaccharide, lipid, carbohydrate, DNA, RNA, more... Phrases: Antigen presentation, viral antigen, antigen recognition, Antigen processing, Tumor antigen, more... Adjectives: specific, human, soluble, nuclear, associated, common, foreign, particular, prostatic, carcinoembryonic, free Colors:     green,     red,     blue,     yellow,     orange, more... ▸ Word origin ▸ Words similar to antigen ▸ Usage examples for antigen ▸ Idioms related to antigen ▸ Wikipedia articles (New!) ▸ Popular adjectives describing antigen ▸ Words that often appear near antigen ▸ Rhymes of antigen ▸ Invented words related to antigen