| Unnatural odor |
異味 |
| Unsecured loa |
無擔保放款 |
| unsteady flow |
非恆定流 |
| unsupervised classification |
非監督式分類 |
| Upeneus moluccensis (Bleeker) |
摩鹿加秋姑魚 |
| Upeneus tragula Richardson |
洋鑽秋姑魚 |
| Upeneus vittatus (Forsskal) |
金帶秋姑魚 |
| Upland Crops Laboratory |
雜糧研究室 |
| Upland Crops Research Office |
特作雜糧研究室 |
| UPOV；the International Union for the Protection of New Varieties of Plants |
國際植物新品種保護聯盟 |
| Uranoscopidae |
瞻星魚科 |
| Uranoscopus bicinctus Temminck & Schlegel |
雙斑瞻星魚 |
| Uranoscopus japonicus Houttuyn |
日本瞻星魚 |
| Uranoscopus oligolepis Bleeker |
貧鱗瞻星魚 |
| Uroconger lepturus (Richardson) |
狹尾糯鰻 |
| Urogymnus africanus (Buloch & Schweider) |
非洲刺土魟 |
| Urolophidae |
平魟科 |
| Urolophus aurantiacus Muller & Henle |
平魟 |
| Uronemosis, Uronema infection |
海水性四膜纖毛蟲症 |
| Urotrygon mundus Gill |
孟達平魟 |
