| Abbreviation | Definition |
|---|---|
| UADE | Unanticipated Adverse Device Event |
| UCB | Umbilical Cord Blood |
| UCBU | Umbilical Cord Blood Unit |
| UCUM | Unified Codes for Units of Measure |
| UCUM | Unified Codes for Units of Measure (Regenstrief Institute) |
| UDHQ | Uniform Donor Health Questionnaire |
| UDI | unique device identification |
| UFC | Unacceptable to Foreign Country |
| UFMS | Unified Financial Management System |
| UIN | Unique Identification Number |
| UKCCR | United Kingdom Coordinating Committee on Cancer Research |
| UL | Underwriters Laboratories |
| ULDB | Urology and Lithotripsy Devices Branch |
| ULDB(CDRH) | Urology and Lithotripsy Devices Branch (CDRH) |
| ULN | Upper Limit of Normal |
| ULPA | Ultra-Low Penetration Air |
| UMCP | University of Maryland-College Park |
| UMDNS | Universal Medical Device Nomenclature System |
| UMLS | Unified Medical Language System |
| UMLS | Unified Medical Language System (NLM) |