| Acronym | Meaning |
| DBP | Disinfection By Product |
| DBPR | Microbiological And Disinfection Byproducts Regulations |
| DBR | Distributed Bragg Reflector |
| DBRA | Division Of Biometry And Risk Assessment |
| DBRTS | Double-barrier Resonant Tunneling Structure |
| DBS | Doppler Broadening Spectroscopy |
| DBS | Dibutyl Sebacate |
| DBTS | Ductile-to-brittle Transition Strain |
| DBTT | Ductile-to-brittle Transition Temperature |
| DC | Blood-air Distribution Coefficient |
| DC | Direct Current |
| DCA | Detrended Correspondence Ordination Analysis |
| DCA | Discriminant Component Anal. |
| DCA | Dressed-cluster Approximation (in Band-structure Calcns.) |
| DCAD | Dietary Cation-anion Difference |
| DCASV | D.c. Anodic Stripping Voltammetry |
| DCB | Distorted Coulomb-Born Approxn. |
| DCB | Double-cantilever Beam |
| DCBA | Drift Chamber Beta-ray Analyzer |
| DCBA | Distorted-coupling Born Approximation |
| DCBOX | Distorted Coulomb-Born No-exchange Approxn. |
| DCBX | Distorted Coulomb-Born Exchange Approxn. |
| DCC | Dextran-coated Charcoalpar |
| DCC | Deleted In Colorectal Cancer |
| DCC | Discharge Consent Conditions |
| DCCA | Drying Control Chemical Additive |
| DCCC | Droplet Counter Current Chromatography |
| DCCI | Dissociation-consistent Configuration Interaction |
| DCEL | Direct Current Electroluminescent |
| DCEN | Direct Current Electrode Negative |
| DCEP | Direct Current Electrode Positive |
| DCFCI | Density-constrained Full-configuration-interaction |
| DCFT | Direct Coal-fired Turbine |
| DCID | Dimensionless Circular Intensity Difference |
| DCIS | Ductal Carcinoma In Situ |
| DCM | Decoupled Cell Monte Carlo (in Simulations On Quantum Systems) |
| DCM | Dilated Cardiomyopathy |
| DCMA | Dry Color Manufacturers' Association |
| DCMD | Direct Contact Membrane Distillation |
| DCN | Document Change Notice |
| DCO | Delayed Compliance Order |
| DCP | Direct Current Plasma |
| DCP | Dicapryl Phthalate |
| DCP | Dicumyl Peroxide |
| DCP | Dual Circular Polarization |
| DCP-OES | Direct Coupled Plasma-optical Emission Spectroscopy |
| DCPA | Dynamic Coherent Potential Approxn. |
| DCPAES | Direct Current Plasma Atomic Emission Spectrometry |
| DCPBH | Double-channel Planar Buried Heterostructure |
| DCPC | Division Of Cancer Prevention And Control |