| Acronym | Meaning |
| DONUT | Direct Observation Of The Nu Tau |
| DOP | Degree Of Pyritization |
| DOP | Dioctyl Phthalate |
| DOP | Dissolved Organic Phosphorus |
| DOPAC | 3,4-dihydroxyphenylacetic Acid |
| DOQSY | Double-quantum Spectroscopy |
| DOR | Delta Opioid Receptor |
| DOR | Double Rotation |
| DORIS | Doppler Orbit And Radio Positioning Integration By Satellite |
| DOS | Density Of States (in Band Structures) |
| DOS | Di(2-ethylhexyl) Sebacate |
| DOSY | Diffusion-ordered Spectroscopy (NMR) |
| DOT | Department Of Transportation |
| DOT | Diffuse Optical Tomography |
| DOTS | Digital-optical Technology System |
| DOUBTFUL | Double Quantum Transitions For Finding Unresolved Lines |
| DOVAM-S | Detection Of Virtually All Mutations-SSCP |
| DOVE | Doubly Vibrationally Enhanced |
| DPA | Dipicolinic Acid |
| DPA | Destructive Physical Analysis |
| DPA | Differential Pulse Amperometry |
| DPA | Displacement Per Atom |
| DPASV | Differential Pulse Anodic Stripping Voltammetry |
| DPAV | Differential Pulse Adsorption Voltammetry |
| DPC | Differential Phase Contrast |
| DPC | Differential Photocalorimetry |
| DPCI | Derwent Patents Citation Index |
| DPCILO | Differential Perturbative Configuration Interaction Using Localized Orbitals |
| DPCSV | Differential Pulse Cathodic Stripping Voltammetry |
| DPD | Diethyl-p-phenylenediamine (test For Chlorine In Water) [93-05-0] |
| DPE | Dual-phase Extraction |
| DPF | Diesel Particulate Filter |
| DPF | Dense Plasma Focus |
| DPFGSE | Double Pulse Field Gradient Spin Echo |
| DPH | Diamond Pyramid Hardness |
| DPIA | Digital Printing And Imaging Association |
| DPM | Disintegrations Per Minutepar |
| DPN | Dip-pen Nanolithography |
| DPP | Differential-pulse Polarography |
| DPP | Dual Purpose Plant |
| DPPC | Dipalmitoyl Phosphatidylcholine |
| DPR | California Department Of Pesticide Regulation |
| DPSS | Diode-pumped Solid-state |
| DPSSL | Diode Pumped Solid State Laser |
| DPSV | Differential Pulse Stripping Voltammetry |
| DPT | Degenerate Perturbation Theory |
| DPT | Diffuse Phase Transition |
| DPT | Direct Perturbation Theory |
| DPUMPN | Double-annihilation Procedure Unrestricted Moeller-Plesset Nth-order |
| DPV | Differential-pulse Voltammetry |