| Acronym | Meaning |
| DIVAH | Diagonally Corrected Vibrationally Adiabatic Hyperspherical (theory In Scattering Calcns.) |
| DIW | Deionized Water |
| DLA | Diffusion-Limited Aggregation |
| DLAS | Diode Laser Absorption Spectroscopy |
| DLC | Diamondlike Carbon |
| DLCA | Diffusion Limited Cluster Aggregation |
| DLD | Decoupled L-dominant Method (in Inelastic-scattering Calcns. |
| DLEED | Diffuse Low-energy Electron Diffraction |
| DLL | Dynamic Link Library |
| DLM | Diffuse Layer Model (of Adsorption) |
| DLMO | Density Localized Molecular Orbital |
| DLOS | Deep-level Optical Spectroscopy |
| DLPCB | Dioxin-like Polychlorinated Biphenyl |
| DLS | Dynamic Light Scattering |
| DLT | Dose-limiting Toxicity |
| DLTFS | Deep Level Transient Fourier Spectroscopy |
| DLTS | Deep-level Transient Spectroscopy |
| DLVO | Derjaguin, Landau, Verwey, And Overbeek Theory |
| DMA | Differential Mobility Analyzer |
| DMA | Dimethylarsinic Acid |
| DMA | Direct Multicomponent Analysis |
| DMA | Distributed Multipole Analysis |
| DMA | Dynamic Mechanical Analysis (for Elastomers) |
| DMAD | Dimethyl Acetylenedicarboxylate |
| DMARD | Disease Modifying Antirheumatic Drug |
| DMBE | Double Many-body Expansion (in Potential Energy Surface Calcn.) |
| DMC | Double Metal Cyanide |
| DMC | Dough Molding Compound |
| DMC | Dynamic Matrix Control |
| DMCC | Dimethylcarbamyl Chloride |
| DMCP | DOE Methods Compendium Program |
| DMCP | Double Microchannel Plate |
| DMD | Duchenne Muscular Dystrophy |
| DMDHEU | Dimethyloldihydroxyethylene Urea |
| DMDS | Dimethyl Disulfide |
| DME | Dimethyl Etherpar |
| DME | Dielectric Midgap Energy (model) |
| DME | Dropping Mercury Electrode |
| DMEM | Dulbecco's Modified Eagle Medium |
| DMETEG | Dimethyl Ether Of Tetraethylene Glycol |
| DMF | Drug Master File |
| DMFC | Direct Methanol Fuel Cell |
| DMFT | Dynamical Mean-field Theory |
| DMICS | Design Methods For Integrated Control Systems [propulsion] |
| DMMP | Dimethyl Methylphosphonate |
| DMO | Delocalized Molecular Orbital |
| DMOS | Diffused Metal-oxide Semiconductor |
| DMPK | Drug Metabolism And Pharmacokinetics |
| DMPK | Myotonic Dystrophy Protein Kinase |
| DMPP | 1,1-dimethyl-4-phenylpiperazinium Iodide |