U字母開頭的單詞或詞組(第3頁)：

• ultrasonic separation
• under utilization
• up a tree
• ulerythema acneiforma
• unlink system call
• urease
• uncontrolled language
• utility compiler
• umbellulone
• ubiquity of the king
• ultraviolet absorbent
• undistributed expense
• unique records only
• unnumbered acknowledge
• utriculus vestibuli
• unwavering
• unavoidable mistake
• undecanoic amide
• understanding program
• under-payment
• unappeasable
• under one's own steam
• unlawful assembly
• ultimate mechanical strength
• urorectal membranes
• unsighted
• urticariogenic
• unwound
• unbuffered option
• uterine neck
• unwished-for
• umlaut
• unmounted
• unilateral diffusion
• urinaria dyspepsia
• unfaltering
• unpaid-up capital
• underworld gang
• upper ease
• uranium dicarbide