u'rinary tract" infec"tion
infection of any part of the urinary tract, esp. the urethra or bladder, usually caused by a bacterium, Escherichia coli, and often precipitated by increased sexual activity, vaginitis, enlargement of the prostate, or stress. Abbr.: UTI
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.