| Abbreviation | Definition |
|---|---|
| CJ | Construction Joint |
| CJB | Closure Joint of Bridge |
| CJP | Closure Joint Phase |
| CJP | Spiral core |
| CL | Conventional Level |
| CLI | Clover Leave Interchange |
| CLKN | Clock Native (Bluetooth) |
| CLS | Canada Land Surveyor |
| CLSD | Clutch Limited Slip Differential |
| CLSP | Certified Lightning Safety Professional |
| CLT | Cross-Laminated Timber |
| CM | Component Momen |
| CM | Compression Mold |
| CM | Cover-Meter |
| CMAME | Computer Methods in Applied Mechanics and Engineering |
| CMBBE | Computer Methods in Biomechanics and Biomedical Engineering (conference) |
| CMCE | Computations and Materials in Civil Engineering |
| CMCE | Construction Management and Civil Engineering |
| CMEB | Chemical Materials Engineering Building |
| CMEC | China Machinery Engineering Corporation |