@
At
a-
before
A&D
Admission and Discharge
A&P
Anterior and Posterior
aa-
of each
Ab
Abortion
abd
abdomen, abdominal
ABG
Arterial 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
AED
Automated external defibrillation
adm
Admission
AHA
American Hospital association
AIDS
acquired immune deficiency disorder
AL
assisted living
am, AM
morning, before noon
AMA
American Medical Association
amal
amalgam