| OHA | Oral Hypoglycemic Agents |
|---|---|
| OHA | oral hypoglycemic agents |
| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
| CTA | Canadian Tuberculosis Association; chemotactic activity; chromotropic acid; Committee on Thrombolyti... |
| ICAAC | Interscience Conference on Antimicrobial Agents and Chemotherapy |