| BOM | bilateral otitis media |
|---|---|
| ARS | acquiescence response scale; adult Reye's syndrome; alcohol-related seizures; alizarin red S; Americ... |
| ICR | [distance between] iliac crests; Institute for Cancer Research; Institute for Cancer Research [mouse... |
| Ra | radial; radium; radius |
| Rad | radiology; radiotherapy; radium |