| Acronym | Meaning |
| CCSF | Central Chemical Storage Facility |
| CCSOP | Close-coupling Second-order Potential (in Scattering) |
| CCSP | Constant Current Stripping Potentiometry |
| CCSR | Calcium Carbonate Saturation Ratio |
| CCSS | Co-composted Sewage Sludge |
| CCST | Complex Coordinate Scattering Theory |
| CCT | Clean Coal Technology |
| CCT | Continuous Cooling Transformation |
| CCTFA | Canadian Cosmetic, Toiletry And Fragrance Association |
| CCTM | Coupled-channel Transition Matrix (in Atom-surface Scattering) |
| CCTP | Clean Coal Technology Program |
| CCTWRS | Cape Cod Toxic Waste Research Site |
| CCV | Continuing Calibration Verification |
| CCW | Constituent Concentrations In Waste |
| CCW | Charge Current Wave (type Of Hartree-Fock Wave Function) |
| CCWE | Constituent Concentrations In Waste Extract |
| CCWP | Close-coupling Wave-packet (for Mol. Scattering) |
| CCWP-J | Close Coupling Wave Packet [in Total Angular Momentum] J [representation] (for Collision Calcns.) |
| CD | Centrifugal Decoupling Approximation (for Atom-mol.scattering) |
| CD | Circular Dichroism |
| CD | Coulomb Dipole (in Electron-atom Impact Ionization Calcns.) |
| CD | Critical Dimension |
| CD ROM | Compact Disk Read Only Memory |
| CD-SCSAG | Centrifugal Dominant-small Curvature Semiclassical Adiabatic Ground State (tunneling Approxn.) |
| CDA | Conceptual Design Activity |
| CDA | Copper Development Association |
| CDA | Cosmic Dust Analyzer |
| CDA | Charge Density Analysis |
| CDA | Cylindrical Deflector Analyzer |
| CDAA | Choline-deficient L-amino Acid Defined Diet |
| CDAF | Continuous Distributed Approximating Function |
| CDBF | Chlorinated Dibenzofurans |
| CDC | Center For Disease Control |
| CDCCC | Centrifugal Droplet Countercurrent Chromatography |
| CDCGE | Continuous Denaturing Capillary Gel Electrophoresis |
| CDD | Charge-density Distortion |
| CDD | Chlorinated Dibenzo-p-dioxin |
| CDDIS | Crustal Dynamics Data Information System |
| CDE | Collective Dose Equivalent |
| CDEDW | Centrifugally-decoupled Exponential Distorted Wave |
| CDEI | Centromere DNA Element I |
| CDER | Center For Drug Evaluation And Research |
| CDF | Collider Detector At Fermilab |
| CDF | Centered Dark Field |
| CDF | Chlorinated Dibenzofuran |
| CDF | Cumulative Distribution Functions |
| CDFT | Chemical-density-functional Theory |
| CDFT | Current (as In C.d.) Density Functional Theory |
| CDHR | Center For Devices And Radiological Health |
| CDHS | California Department Of Health Services |