| Abbreviation | Definition |
|---|---|
| CTDB2 | Chemistry and Toxicology Devices Branch 2 |
| CTDB2(CDRH) | Chemistry and Toxicology Devices Branch 2 (CDRH) |
| CTEB | Cosmetics TEchnology Branch |
| CTEB(CFSAN) | Cosmetics Technology Branch (CFSAN) |
| CTEP | Cancer Therapy Evaluation Program |
| CTFA | Cosmetic, Toiletry, and Fragrance Association |
| CTIA | Cellular Telecommunications and Internet Association |
| CTM | Clinical Trials Material |
| CTO | Clinical Trial Outline |
| CTOB | Cosmetics TOxicology Branch |
| CTP | Center For Tobacco Products |
| C-TPAT | Customs-Trade Partnership Against Terrorism |
| CTS | Correspondence Tracking System |
| CTS | counseling and testing site |
| CTTB | Cellular and Tissue Therapy Branch |
| CTTB(CBER) | Cellular and Tissue Therapy Branch (CBER) |
| CTTI | Clinical Trials Transformation Initiative |
| CTX | Clinical Trials Exemption |
| CU | Consumers' Union |
| CUE | Confidential Unit Exclusion |