ACL
Anterior cruciate ligament (of knee)
ADD
Attention Deficit Disorder
AD
Alzheimer Disease
ADHD
Attention Deficit/Hyperactivity Disorder
AIDS
Acquired Immunodeficiency Syndrome
ALS
Amyotrophic Lateral Sclerosis (Lou Gehrig disease)
BE
Barium enema
BM
Bowel movement; bone marrow