| IAT | instillation abortion time; iodine azide test; invasive activity test |
|---|---|
| IDA | idamycin; image display and analysis; iminodiacetic acid; insulin-degrading activity; iron deficienc... |
| ILA | insulin-like activity; International Leprosy Association |
| IRA | immunoradioassay; immunoregulatory alpha-globulin; inactive renin activity |
| JAS | Jenkins Activity Survey; juvenile ankylosing spondylitis |