| Abbreviation | Definition |
|---|---|
| CTPE | Corrected Transient Potential Energy |
| CTPP | Contributions to Plasma Physics |
| CTR | Consolidated Time Rate |
| CTR | Controlled Thermonuclear Reaction |
| CTRZ | Central Torodial Recirculation Zone |
| CTS | Convert Texture Sequence |
| CTWT | Cross Trapezoid Wave Tape |
| CU | Collision Unconformity |
| CUP | Copper Units Pressure |
| CUP | Curl Usability Productivity |
| CUPP | Centre for Underground Physics in Pyhäsalmi |
| CUT | INCORRECT abbreviation for Coordinated Universal Time (see UTC) |
| CUTBA | Cleaning Up the Tower of Babel of Acronyms |
| CV | Constant Velocity |
| Cv | Flow Coefficient |
| CVAAS | Cold Vapor Atomic Absorption Spectroscopy |
| CW | carrier wave" |
| CWP | Century Women to Physics |
| CWW | Clock Worked by Weight |
| D | Dense |