| Abbreviation | Definition |
|---|---|
| ACCP | Alliance for Cervical Cancer Prevention |
| ACDC | Advanced Center For Detection Of Cancer |
| ACDM | Association for Clinical Data Management |
| ACLT | African Caribbean Leukaemia Trust |
| ACO | Action Cancer Ontario (French title of Cancer Care Ontario) |
| ACOG | American College of Obstetricians Gynecologists |
| ACOG | American College of Obstetricians & Gynecologists |
| ACOHA | Advanced Care Oncology and Hematology Associates |
| ACOR | Association of Cancer Online Resources |
| ACORN | Accelerated Community Oncology Research Network |
| ACR | Alaska Cancer Registry |
| ACR | Allowed Cell Rate |
| ACRP | Australian Cancer Research Program |
| ACRPI | Association of Clinical Research for the Pharmaceutical Industry |
| ACSR | AIDS and Cancer Specimen Resource |
| ADCC | Antibody-Dependent Cellular Cytotoxicity |
| ADOC | Acute Diagnostic Oncology Clinic |
| ADOL | Avian Disease and Oncology Laboratory |
| ADR | Adverse Drug Reaction |
| ADROP | Association for Directors of Radiation Oncology Programs |