All abbreviations and full forms starting with A
| Term | Full Form | Category |
|---|---|---|
| A | Allergist 
| Others |
| A | Allergy
| Others |
| A | Alpha
| Others |
| A | Alternative
| Others |
| A | Alton Railroad
| Others |
| A | alveolar gas
| Others |
| A | Alveolization
| Others |
| A | Amendment of Application
| Others |
| A | American
| Others |
| A | American Bank Note Company
| Others |
| A | Ampere
| Measurement Unit, Electricity |
| A | Anal
| Others |
| A | Analog
| Others |
| A | Analog signal
| Others |
| A | Analysis
| Others |
| A | Anaphylaxis
| Others |
| A | Ancyclostoma
| Others |
| A | Andrei
| Others |
| A | Anglo American Cataloguing Rule
| Others |
| A | Angstrom
| Others |
| A | Animal
| Others |
| A | Animals
| Others |
| A | Anion
| Others |
| A | Ankle Jerk/Reflex
| Others |
| A | Ann
| Others |
| A | Annealing
| Others |
| A | Annihilation
| Others |
| A | Annoying
| Others |
| A | Anode
| Others |
| A | anoxia/reoxygenation
| Others |
| A | Ant
| Others |
| A | Anteater
| Others |
| A | Anterior
| Others |
| A | antinuclear antibody (ANA is more commonly used)
| Others |
| A | Ape
| Others |
| A | Aperture
| Others |
| A | apical/radial
| Others |
| A | Apple
| Others |
| A | Appropriate
| Others |
| A | Approved
| Others |
| A | Apron
| Others |
| A | Aqua
| Others |
| A | Aqueous
| Others |
| A | Arbitration
| Others |
| A | Archived
| Others |
| A | Archives
| Others |
| A | Area
| Others |
| A | Art
| Others |
| A | Arte
| Others |
| A | Artemis
| Others |