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Abbreviations A
| Term | Definition |
|---|---|
| @ | at |
| _ a | before |
| A&D | admission and discharge |
| A&P | anterior and posterior, anatomy and physiology |
| __ aa | of each |
| Ab | abortion |
| abd | abdomen, abdominal |
| ABG | anterior blood gas |
| ac | before meals |
| ACLS | advanced cardiac life support |
| ACTH | adrenocorticotropic hormone |
| AD | right ear |
| ADH | antidiuretic hormone |
| ADHD | attention deficit hyperactivity disorder |
| ad lib | as desired |
| ADL | activities of daily living |
| adm | admission |
| AED | automated external defibrillation |
| AHA | American Hospital Association |
| AIDS | acquired immune deficiency syndrome |
| AL | assisted living |
| am, AM | morning, before noon |
| AMA | American Medical Association, against medical advice |
| amal | amalgam |
| amb | ambulate, walk |
| amt | amount |
| ANA | American Nurses' Association |
| ANP | advanced nurse practitioner |
| ANS | autonomic nervous system |
| ant | anterior |
| AP | apical pulse |
| approx | approximately |
| aq, aqua | aqueous (water based) |
| ARC | AIDS-related complex |
| ARF | acute renal failure |
| AS | left ear |
| as tol | as tolerated |
| ASA | aspirin (acetylsalicylic acid) |
| ASAP | as soon as possible |
| ASCVD | arteriosclerotic cardiovascular disease |
| ASHD | arteriosclerotic heart disease |
| AU | both ears |
| Ax | axilla, axillary, armpit |