| Abbreviation | Definition |
|---|---|
| KTM | Kinetic Thermal Mixing |
| LA | Lactic Acid |
| La | Lanthanum |
| LA | Linoleic Acid |
| LAAA | L Amino Acid Amidase |
| LAAO | L amino acid oxidases |
| LAB | Lactic Acid Bath |
| LAB | Linear Alkyl Benzene |
| LABSA | Lauryl alkyl benzene sulfonic acid |
| LABSA | Linear Alkyl Benzene Sulfonic Acid |
| LABSA | Linear Alkyl Benzene Sulphonic Acid |
| LACTI | Lactic acid |
| LAE | Lyman Alpha Emitter |
| LAL | Lysosomal acid lipase |
| LALD | Lysosomal acid lipase deficiency |
| LAMO | Lithium Aluminum Manganese Oxide |
| LASER | Language Arts Science Enrichment And Resource |
| LASER | Legacy Application Systems Empowered Replacement |
| LASER | Light Amplification by Stimulated Emission of Radiation |
| LASTO | Linearized Augmented Slater-Type Orbitial |