| A&B | apnea and bradycardia |
|---|---|
| ABBQ | Acquired Immunodeficiency Syndrome Beliefs and Behavior Questionnaire |
| A&BC | air and bone conduction |
| ABD | abdomen; aged, blind, and disabled; aggressive behavioral disturbance; average body dose |
| ABO | abortion; absent bed occupancy; American Board of Orthodontists; blood group system consisting of gr... |