ABC
Airway, breathing, circulation
abd.
abdomen
ABG
Arterial blood gas
ABO
System of classifying blood groups
ac
Before meals
ACE
Angiotensin-converting enzyme
ACS
Acute compartment syndrome
ACTH
Adrenocorticotrophic hormone
ADL
Activities of daily living
ADH
Antidiuretic hormone
ad lib
freely, as desired
AFP
alpha-fetoprotein
AIDS
Aquired immunodeficiency syndrome
AKA
above knee amputation
ALL
Acute lymphocytic leukemia
ALP
alkaline Phosphatase (formerly SGPT)
ALS
amyotrophic lateral sclerosis
ALT
alanine aminotransferase
AMI
antibody-mediated immunity
AML
acute myclogenous leukemia
amt.
amount
ANA
antinuclear antibody
ANS
autonomic nervous system
AP
anteposterior