| UC | ulcerative colitis; ultracentrifugal; umbilical cord; unchanged; unclassifiable; unconscious; undiff... |
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| UCBC | umbilical cord blood culture |
| UH | umbilical hernia; uncontrolled hemorrhage; unfavorable histology; upper half |
| umb | umbilicus, umbilical |
| UV | ultraviolet; umbilical vein; ureterovesical; Uppsala virus; urinary volume |
| umbilical region | The central region of the abdomen about the umbilicus. Synonym: regio umbilicalis. (05 Mar 2000) |
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| umbilical ring | An opening in the linea alba through which pass the umbilical vessels in the foetus; in young embryos it is relatively nearer to the pubis, but gradually ascends to the centre of the abdomen; it is closed in the adult, its site being indicated by the umbilicus or navel. Synonym: annulus umbilicalis, canalis umbilicalis. (05 Mar 2000) |
| umbilical souffle | <obstetrics, paediatrics> A blowing murmur, synchronous with the foetal heart beat, sometimes only systolic and sometimes continuous, heard on auscultation over the pregnant uterus. Synonym: funic souffle, funicular souffle, umbilical souffle. (05 Mar 2000) |
| umbilical vein | See: left umbilical vein. (05 Mar 2000) |
| umbilical veins | Veins which carry oxygenated, nutrient-rich blood from the placenta and which are obliterated in the first few days after birth. (12 Dec 1998) |
| umbilical vesicle | <embryology, ornithology> One of the set of extra embryonic membranes, growing out from the gut over the yolk surface, in birds formed from the splanchnopleure, an outer layer of splanchnic mesoderm and an inner layer of endoderm. (18 Nov 1997) |
| ureteric branches of the patent part of umbilical artery | <anatomy, artery> Supplies pelvic portion of ureter. Synonym: rami ureterici partis patentis arteriae umbilicale. (05 Mar 2000) |
| left umbilical vein | <anatomy, vein> The vein that returns the blood from the placenta to the foetus; traversing the umbilical cord, it enters the foetal body at the umbilicus and passes thence into the liver, where it is joined by the portal vein; its blood then flows by way of the ductus venosus and the inferior vena cava to the right atrium. Synonym: vena umbilicalis sinistra. (05 Mar 2000) |
| Amberg's lateral sinus line | A line dividing the angle formed by the anterior edge of the mastoid process and the temporal line. (05 Mar 2000) |
| amyotrophic lateral sclerosis | A serious neurologic disease that results from the progressive degeneration of the motor neurons. (27 Sep 1997) |
| amyotropic lateral sclerosis | A chronic progressive disease of motor neurons (the nerves that come from the spinal cord to supply electrical energy to the muscles). (12 Dec 1998) |
| anterior lateral malleolar artery | <anatomy, artery> Origin, anterior tibial; distribution, ankle joint; anastomoses, peroneal, lateral tarsal. Synonym: arteria malleolaris anterior lateralis. (05 Mar 2000) |
| bulb of lateral ventricle | A rounded elevation in the dorsal part of the medial wall of the posterior horn of the lateral ventricle, produced by the major forceps. (05 Mar 2000) |
| bulb of posterior horn of lateral ventricle of brain | Bulb of posterior horn of lateral ventricle of the brain; a curved elevation on the inner wall of the posterior horn produced by the fibres of the forceps major of the corpus callosum as they bend backward into the occipital lobe. Synonym: bulb of posterior horn of lateral ventricle of brain. (05 Mar 2000) |
| vein of lateral recess of fourth ventricle | A small vein originating in the cerebellar tonsil, coursing by the lateral recess of the fourth ventricle on its way to terminate in the petrosal vein. Synonym: vein of lateral recess of fourth ventricle. (05 Mar 2000) |