| GUS | genitourinary sphincter; genitourinary system |
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| IAS | immunosuppressive acidic substance; infant apnea syndrome; insulin autoimmune syndrome; interatrial ... |
| ICS | ileocecal sphincter; immotile cilia syndrome; impulse-conducting system; integrated case study; inte... |
| LES | Lambert-Eaton syndrome; Lawrence Experimental Station [agar]; local excitatory state; Locke egg seru... |
| LESP | lower esophageal sphincter pressure |
| urethral crest of female | A conspicuous longitudinal fold of mucosa on the posterior wall of the urethra. Synonym: crista urethralis femininae. (05 Mar 2000) |
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| urethral crest of male | A longitudinal fold on the posterior wall of the urethra extending from the uvula of the bladder through the prostatic urethra; prominent in its midportion is the seminal colliculus. Synonym: crista phallica, crista urethralis masculinae. (05 Mar 2000) |
| urethral dilation | Increasing the caliber of the urethra by passage of a dilator. (05 Mar 2000) |
| urethral diverticulum | A sac-like outpouching of the urethral wall, either from a congenital defect or, more commonly, as a result of chronic penetrating inflammation. (05 Mar 2000) |
| urethral fever | An elevation of temperature, usually slight and transitory, following catheterization of the urethra, or the passage of blood clots, gravel, or a calculus. Synonym: catheter fever, urethral fever. (05 Mar 2000) |
| urethral glands | See: glands of the female urethra, glands of the male urethra. (05 Mar 2000) |
| urethral groove | The groove on the ventral surface of the embryonic penis which ultimately is closed to form the penile portion of the urethra. (05 Mar 2000) |
| urethral haematuria | Haematuria in which the site of bleeding is in the urethra. (05 Mar 2000) |
| urethral lacuna | One of a number of little recesses in the mucous membrane of the spongy urethra into which empty the ducts of the urethral glands. Synonym: lacuna urethralis, Morgagni's lacuna. (05 Mar 2000) |
| urethral neoplasms | Neoplasms or tumours of the urethra. This condition is relatively uncommon and is the only cancer of the urinary system that has a higher incidence rate in females than males. Squamous cell carcinoma is the most frequent histologic type. (12 Dec 1998) |
| urethral obstruction | Obstruction anywhere along the urethra. (12 Dec 1998) |
| urethral openings | See: external urethral orifice, internal urethral orifice. (05 Mar 2000) |
| urethral papilla | Papilla urethralis, the slight projection often present in the vestibule of the vagina marking the urethral orifice. (05 Mar 2000) |
| urethral plate | An endodermal plate located ventromedially in the developing genital tubercle of a young embryo; it later opens to form the lining of the penile urethra. (05 Mar 2000) |
| urethral pressure profile | The continual recording of pressure through a hole in the side of a small catheter as it is pulled (at a constant rate while either water or a gas is infused through the hole) from a point within the bladder, through the vesical neck, and down the entire urethra; a form of resistance measurement which gives a tracing indicative of the functional length of the urethra and the points of maximal urethral resistance. (05 Mar 2000) |