| ARI | Acute Respiratory tract Infections |
|---|---|
| ARI | acute respiratory illness |
| ARI | Acute respiratory insufficiency |
| ARI | Adhesive Remnant Index |
| ARI | aldose reductase inhibitor |
| ARIC | Atherosclerosis Risk In Communities |
| ARIMA | Auto Regressive Integrated Moving Average |
| ARIS | Apoenzyme Reactivation Immunoassay System |
| Ark | Arkansas |
| ARL | AIDS)-related lymphoma |