| Abbreviation | Definition |
|---|---|
| ALDH | ALdehyde DeHydrogenase |
| ALKP | Alkaline phosphatase |
| Al-Li | aluminum-lithium alloy |
| ALNA | Alpha Linolenic Acid |
| ALP | Activating Local Potential |
| AMA | Analytic Meticulous And Affordable |
| AMA | Atomic Moment Approximation |
| AMD | Acid Mine Drainage |
| AMP | Adenosine MonoPhosphate |
| AMR | Analytical Method Recovery |
| AMT | Amino Mercapto Thiadiazole |
| AN | Acid Number |
| AN | Ammonium Nitrate |
| ANA | Anti-Nuclear Antibody |
| ANA | Atomic Non Atomic |
| ANBS | Acrylo Nitrile Butadiene Sryrene |
| ANBS | Acrylo Nitrile Butadiene Styrene |
| ANC | Acid Neutralization Capacity |
| ANC | Acid Neutralizing Capability |
| ANCQ | Australian National Chemical Quiz |