| Abbreviation | Definition |
|---|---|
| RA | respiratory arrest |
| RA | retinoic acid |
| RA | revenue account (!) |
| RA | Rheumatoid arthritis |
| RA | right anterior |
| RA | right atrial |
| RA | rotational atherectomy |
| RA | rounded atelectasis |
| RA | route of administration |
| RAB | recombinant antibody |
| RAB | Resource Accounting and Budgeting |
| RAB | Resource Accounting Body |
| RAB | risk assessment battery |
| RAc | Registered Acupuncturist |
| RACI | Responsible, Accountable, Consulted, Informed |
| RACPC | rapid access chest pain clinic |
| RADS | Reactive airways dysfunction syndrome |
| RAE | reactive angioendotheliomatosis |
| RAF | Referral Access Service |
| RAG | Red Amber Green (traffic light) |