| Acronym | Meaning |
| AAA | Abdominal Aortic Aneurysm |
| AB | Abortion |
| ABG | Arterial Blood Gases |
| AC | Before Meals |
| AC | Anterior Cephalic Vein |
| ACE | Angiotensin Converting Enzyme |
| ACL | Anterior Cruciate Ligament |
| ACTH | Adrenocorticotropic Hormone |
| ADA | American Diabetes Association |
| ADH | Antidiuretic Hormone |
| ADL | Activities Of Daily Living |
| ADL | Activities Of Daily Living |
| AED | Automated External Defibrillator |
| AF | Atrial Fibrillation |
| AFA | Advanced First Aid |
| AFB | Acid-fast Bacilli |
| AFP | Alpha-fetoprotein |
| AGA | Appropriate For Gestational Age |
| AIDS | Acquired Immune Deficiency Syndrome |
| AKA | Above Knee Amputation |
| AKF | Acute Kidney Failure |
| ALP | Alkaline Phosphatase |
| ALP | Alkaline Phosphatase |
| ALT | Alanine Transaminase |
| AMA | Against Medical Advice |
| AMI | Acute Myocardial Infarction |
| AODM | Adult Onset Diabetes Mellitus |
| AP | Apical Pulse |
| APE | Acute Pulmonary Edema / Acute Pulmonary Embolism |
| APO | Acute Pulmonary Oedema |
| APSGN | Acute Poststreptococcal Glomerulonephritis |
| ARDS | Acute Respiratory Distress Syndrome |
| ARF | Acute Renal Failure |
| ARF | Acute Renal Failure |
| AS | Auricle Sinistrus (Left Ear) |
| ASAD | Arthroscopic Subacromial Decompression |
| ASCUS | Atypical Squamous Cells Of Unknown Significance |
| ASD | Atrial Septal Defect |
| ASHD | Arteriosclerotic Heart Disease |
| AST | Aspartate Aminotransferase |
| ATN | Acute Tubular Necrosis |
| AU | Both Ears |
| AV | Atrio-Ventricular (cardiac) |
| AVB | Atrio-Ventricular Block |
| AVB | Atrio-ventricular Block |
| B/K | Below Knee |
| B/K | Below Knee |
| BA | Breathing Apparatus |
| BAC | Blood Alcohol Content |
| BBP | Blood-Borne Pathogen |