U字母開頭的單詞或詞組(第18頁)：
- unexpended balance
- upflow filter
- unreliable protocol
- unreported
- urgent order
- universal relation assumption
- ur-
- utility sinking fund
- Uragoga granatensis Baillon
- unusual event recording system
- unimolecular mechanism
- unidimensional
- uveoplasty
- unprotected dynamic storage
- utiliscope
- untruth
- uncollected interest
- unrealized gross margin
- urorrhagia
- urea acetate
- urea complex
- understrapper
- unofficial
- under separate cover
- unallowable instruction check
- unkilled steel
- unopposed
- untitled
- underground economy
- under control
- unipotential
- uniprogrammed system
- unperturbed
- up and about
- undecked
- ulcus ambulans
- uranium deuteride
- unit cost
- undecalcified
- ulectomy