Ursan.[天]大熊星座;[天]小熊星座
Urn.铀
uropathogenic E.coli尿道致病性大肠埃希菌
urogenital tuberculosis泌尿生殖漆核,泌尿生殖器结核
urographia intraveinous静脉尿路造影术
urodynamic French gauge尿动力学的法兰西测量计
urobilinogen method for检尿胆素原法
Urbach-Wiethe disease皮肤粘膜类脂沉积症
Urocissa erythrorhynchan.红嘴蓝鹊
Uranotaenia unguiculatan.长爪蓝带蚊