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- unilateral unilocular unimmunised uninephrectomies uninfected uninucleate uniocular union uniovular unipara uniparental uniparous unipennate unipolar unipotent unirradiated unit unit character unit membrane unitage univalent universal antidote universal donor universal recipient universal serologic reaction unlabeled unlabored unlicenced unlinked unmedullated unmyelinated unnilhexium unnilpentium
- unnilquadium unofficial unopposed unorganised unossified unoxygenated unpaired unpasteurised unphysiologic unpigmented unprotected unreactive unresectable unresolved unresponsive unsanitary unsaponifiable unsaturate unsaturated unsaturation unsegmented unsex unsound unstable unstable angina unstriated unstriated muscle unstructured untransformed untranslated untraumatised untreatable untreated
- unvaccinated unwell upgrade upper upper GI series upper airway upper facial index upper gastrointestinal series upper jaw upper respiratory upper respiratory tract upregulate upset upstream uptake urachal urachus uracil uraemia uramil uranin uraninite uranium uranium 235 uranoplasties uranoschises uranostaphyloplasties uranyl acetate urate uratic urea urea cycle urea peroxide