- 1. Abbreviation for unit. 2. Symbol for kilurane; uranium; uridine in polymers; uracil; urinary concentration, followed by subscripts indicating location and chemical species.* * *congenital limb absence; in electrocardiography, an undulating deflection that follows the T wave; internal energy; International Unit of enzyme activity; Mann-Whitney rank sum statistic; potential difference (in volts); ulcer; ulna; ultralente [insulin]; umbilicus; uncertain; unerupted; unit [JCAHO unapproved abbreviation]; universal application [residency]; unknown; unsharpness; upper; uracil; uranium; urea; urethra; uridine; uridylic acid; urinary concentration; urine; urology; uterus; uvula; volume velocity
* * *U abbr uracilU symbol uranium
* * *uranium; uracil; uridine; international unit of enzyme activity; unit (on the JCAHO "Do Not Use" List).
Medical dictionary. 2011.