Ursan.[天]大熊星座;[天]小熊星座
Urn.铀
uramino-acetic acid[医] 脲乙酸
Uronema confervicolum尾丝藻
Urumqi Railway Bureau乌鲁木齐铁路局
Uromyces glycyrrhizaen.甘草单胞锈菌
uridine pyrophosphate尿(嘧啶核)苷焦磷酸酯
uridine monophosphate尿甙酸,尿苷酸
urogenitalis aparatus尿生殖器
Ursus arctos Linnaeus棕熊
Uromyces loculiformisn.腔形单胞锈菌
Uronate dehydrogenase尿酸脱氢酶