- unconscionability[unconscionability 词源字典]
- "= unconscionableness", Early 20th cent.; earliest use found in Harvard Law Review.[unconscionability etymology, unconscionability origin, 英语词源]
- uran-mica
- "= torbernite", Early 19th cent.; earliest use found in Robert Jameson (1774–1854), geologist and natural historian. After German Uranglimmer.
- urbanology
- "The branch of knowledge that deals with urban areas and urban life", 1950s; earliest use found in Economic Geography. From urban + -ology.
- uber-
- "Denoting an outstanding or supreme example of a particular kind of person or thing", German über 'over', after Übermensch.
- Übermensch
- "The ideal superior man of the future who could rise above conventional Christian morality to create and impose his own values, originally described by Nietzsche in Thus Spake Zarathustra (1883-5)", German, literally 'superhuman person'.
- unguis
- "A nail, claw, or fang", Early 18th century: from Latin.
- ulcerate
- "Develop into or become affected by an ulcer", Late Middle English: from Latin ulcerat- 'made ulcerous', from the verb ulcerare.