| renal veins | Large veins formed at the renal hilus by the merger of the segmental veins anterior to the corresponding arteries; they open at right angles into the inferior vena cava at the level of the second lumbar vertebra. The left renal vein receives the left suprarenal vein and the left gonadal vein, and passes through the angle between the abdominal aorta and superior mesenteric artery where it may be compressed. Synonym: venae renales. (05 Mar 2000) |
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| renal-portal | <anatomy> Both renal and portal. See Portal. Source: Websters Dictionary (01 Mar 1998) |
| renal-splanchnic steal | Diversion of blood from the right renal artery via the inferior adrenal branch into splanchnic collaterals distal to a stenosis of the coeliac axis. (05 Mar 2000) |
| renal-splenic venous shunt | Anastomosis of the splenic vein to the left renal vein, usually end-to-side, for control of portal hypertension. Synonym: renal-splenic venous shunt. (05 Mar 2000) |
| renaturation | <molecular biology> The conversion of denatured protein or DNA to its native configuration. This is rare for proteins. However, if DNA is denatured by heating the two strands separate and if the heat denatured DNA is then cooled slowly the double stranded helix reforms. (25 Jun 1999) |
| renature | <molecular biology> The reannealing (hydrogen bonding) of single-stranded DNA and/or RNA toform a duplex molecule. (09 Oct 1997) |
| Renaut body | Subperineurial structure comprised of loosely arranged and randomly oriented collagen fibres in a fine fibrillary material, seen in normal nerve as well as in certain pathologic states. (05 Mar 2000) |
| renculus | Synonym: cortical lobules of kidney. Synonym: reniculus. (05 Mar 2000) |
| Rendu, Henri | <person> French physician, 1844-1902. See: Rendu-Osler-Weber syndrome. (05 Mar 2000) |
| Rendu-Osler-Weber syndrome | <gastroenterology> An inherited disease characterised by thin blood vessel walls in the nose, skin and gastrointestinal tract. This condition ins associated with a high risk of bleeding complications. Inheritance: autosomal dominant. (27 Sep 1997) |
| renewable energy resource | <ecology> An energy resource replenished continuously or that is replaced after use through natural means. Sustainable energy. Renewable energy resources include bioenergy, solar energy, wind energy, geothermal power, and hydropower. (25 Jun 1999) |
| reni- | See: reno-. (05 Mar 2000) |
| renicapsule | The capsule of the kidney. Origin: reni-+ L. Capsula, capsule (05 Mar 2000) |
| renicardiac | Synonym: cardiorenal. Origin: reni-+ G. Kardia, heart (05 Mar 2000) |
| reniculus | Synonym: cortical lobules of kidney. 2. A lobe of the human foetal kidney and that of some lower animals in which fibrous septa subdivide the organ. Synonym: renculus, renunculus. Origin: L. Dim. Of ren, kidney (05 Mar 2000) |