| Abbreviation | Definition |
|---|---|
| QC | Quantum Counter |
| QC | Quantum Critical |
| QC | Questionable Causation |
| QCA | Quasi- Crystalline Approximation |
| QCC | Quadrupole Coupling Constant |
| QCD | Quantum Chromo Dynamics |
| QCI | Quadratic Configuration Interaction |
| QCL | Quantum Cascade Laser |
| QCT | Quantitative Computed Tomography |
| QCT | Quasi-Classical Trajectory |
| QD | quantum dot |
| QDL | Quantize Delay Line |
| QDO | Quantum Drude Oscillator |
| QDT | Quantum- Defect Theory |
| QDVP | Quasi-Degenerate Variational Perturbation |
| QDW | Quantum Density- Wave |
| QE | Quantum Effect |
| QED | quantum electrodynamics |
| QED | Quantum Electro-Dynamics |
| QEDA | Quantum ElectroDynamics Atomic theory |