Ursan.[天]大熊星座；[天]小熊星座Urn.铀Uromyces sommerfeltiin.萨氏单胞锈菌Urocerus lijiangensis丽江大树蜂Urticaria due to cold寒冷致荨麻疹uric sugar test paper尿糖试纸Uromyces inaequialtusn.不等单胞锈菌ursodesoxycholic acid乌索脱氧胆酸,熊去氧胆酸Uromyces viciae fabaen.蚕豆单胞锈菌uridine phosphorylase尿(核)苷磷酸化酶, 尿(嘧啶核)苷磷酸化酶Urtica cannabina L.掀麻Urtica mairei Levl.滇藏荨麻