U字母開頭的單詞或詞組(第16頁)：
- unilateral mistake
- unit record principle
- urobilin
- United Nations Educational Scientific and Cultural Organizattion
- unlace
- unnerved
- uniform random number
- unprotect document
- unlawful attack
- unity gain bandwidth
- use prefix
- untidy
- upper bench
- unique address
- ultrastable Y-type zeolite
- undergo sb's trial for
- unwarranted loss
- unidirection current
- upstream operations
- utmost good faith
- UAD
- unarm
- uncritical
- unassigned object
- up to the eyes
- unencysted Amoeba
- unlabored
- unnormalized number
- uninuclear
- unallowable character
- ulnar eminence of the wrist
- up wind
- uveal
- under one's nose
- uniport
- unshift-on-space
- urge
- urticaria conferta
- urouepsin
- urachal fossae