| Main Entry: | |
| Part of Speech: | noun |
| Definition: | irritant |
| Synonyms: | antigen, dander, dust mite, foreign substance, immune trigger, irritant, pollen, ragweed |
| Main Entry: | serum |
| Part of Speech: | noun |
| Definition: | antitoxin |
| Synonyms: | agglutinin, agglutinogen, agglutinoid, antibody, antigen, antiserum, immunizer, immunotoxin, vaccine |