egtazic acid依他酸：四羧酸螯合剂，结构及作用皆与依地酸(EDTA)相似，惟对钙的亲和性高于镁；用于生化测定及制药辅助- udder
- UDP
- UDP-bilirubin glucuronosyltransferase
- UDP-galactose 4-epimerase
- UDP-glucose 4-epimerase
- UDP-glucose-hexose-1-phosphate uridylyltr-ansferase
- UDP-glucose pyrophosphorylase
- UDP-glucuronate-bilirubin-glucuronosyltran-sferase
- UDP-glucuronyl transferase
- UDP-N-acetylglucosamine-lysosomal-enzyme;N-acetyl-glucosaminephosphotransfera
- Udranszky's test
- Uffelmann's test(reagent)
- UIex europaeus
- ulalgia
- ulatrophy
- ulcer
- ulcera
- ulcerate
- ulceration
- ulcerative
- ulcerogangrenous
- ulcerogenic
- ulcerogranuloma
- ulceromembranous
- ulcerous