| Abbreviations | Meaning |
 | A | Blood Group A |
 | A | Arterial Blood |
 | AABB | American Association Of Blood Banks; Axis-aligned Bounding Boxes |
 | AB | Blood Group AB |
 | AB-SAAP | Autologous Blood Selective Aortic Arch Perfusion |
 | ABC | Alum, Blood, And Charcoal (purification And Deodorizing Method) |
 | ABC | Alum, Blood, And Clay (sludge Deodorizing Method) |
 | ABC | Alum, Blood, And Charcoal [purification And Deodorizing Method] |
 | ABC | Alum, Blood, And Clay [sludge Deodorizing Method] |
 | ABC | American Blood Commission |
 | ABCD | Appropriate Blood Pressure Control In Diabetes; Asymmetry, Borders Are Irregular, Color Variegated, Diameter > 6 Mm [biopsy In Melanoma] |
 | ABF | Aortic Blood Flow; Aortobifemoral |
 | ABG | Arterial Blood Gases |
 | ABG | Arterial Blood Gas; Axiobucco-gingival |
 | ABL | Abelson Proto-oncogene; Abetalipoproteinemia; Acceptable Blood Loss; Acute Basophilic Leukemia; African Burkitt Lymphoma |
 | ABLES | Adult Blood Lead Epidemiology And Surveillance |
 | ABO | Blood Grouping System |
 | ABO | Blood Group System Consisting Of Groups A, AB, B, And O |
 | ABP | Antigen-binding Protein; Arterial Blood Pressure; Automatic Systolic Blood Pressure Measurement; Avidin-biotin Peroxidase |
 | ABP | Arterial Blood Pressure |
 | ABP | Ambulatory Blood Pressure |
 | ABPM | Ambulatory Blood Pressure Monitoring |
 | ABS | Arterial Blood Pressure |
 | ABS | Abdominal Surgery; Acidic Ammonium Bisulfate; Acute Brain Syndrome; Adaptive Behavior Scale; Admitting Blood Sugar |
 | ABS | Arterial Blood Sample |
 | ABT | Abstract Behavioral Type; Autologous Blood Transfusion; Lopinavir |
 | ACB | Antibody-coated Bacteria; Aortocoronary Bypass; Arterialized Capillary Blood; Asymptomatic Carotid Bruit |
 | ANBP | Australian National Blood Pressure [trial] |
 | APTH | Ambulatory Blood Pressure Monitoring And Treatment Of Hypertension |
 | ASBMT | American Society For Blood And Marrow Transplantation |
 | AUVIB | Autotransfusion Of UV-irradiated Blood |
 | B | Blood, Bloody |
 | B/P | Blood Pressure |
 | BA | Blood Alcohol |
 | BA | Blood Agar |
 | BAB | Blood Agar Base |
 | BAC | Blood Alcohol Concentration |
 | BAHAMA | Baragwanath Hypertension Ambulatory Blood Pressure Monitoring Multiarm |
 | BAL | Bio-artificial Liver; Blood Alcohol Level; British Anti-lewisite; Bronchoalveolar Lavage |
 | BAP | Blood-agar Plate |
 | BART | Blood-activated Recalcification Time |
 | BASC | Blood Pressure In Acute Stroke Collaboration |
 | BB | Blood Buffer |
 | BB | Blood Bank |
 | BBB | Blood Buffer Base |
 | BBB | Blood-brain Barrier |
 | BBB | Blood-brain Barrier; Blood Buffer Base; Bundle-branch Block |
 | BBBD | Blood Brain Barrier Disruption |
 | BBF | Bronchial Blood Flow |
 | BC | Blood Culture |