| immunoglobulin A: a class of antibodies predominant in respiratory and alimentary tract secretions and in saliva and tears, functioning as the body's first line of defense against invading foreign substances esp. by neutralizing viral antigens and by preventing the adherence of bacteria to mucous membrane surfaces. |
| IgA abbr. immunoglobulin A |
| immunoglobulin A n. Abbr. IgA The class of antibodies produced predominantly against ingested antigens, found in body secretions such as saliva, sweat, or tears, and functioning to prevent attachment of viruses and bacteria to epithelial surfaces. |
| IgA immunoglobulin A |
| IGA integrated graphics array |
