| Rotavirus | <virology> Genus of the Reoviridae having a double layered capsid and 11 double stranded RNA molecules in the genome. They have a wheel like appearance in the electron microscope and cause acute diarrhoeal disease in their mammalian and avian hosts. Probably the most important cause of severe dehydrating diarrhoea in children under three years of age worldwide. Symptoms include nausea, vomiting, low-grade fever and diarrhoea. Aggressive fluid replacement is generally required. (27 Sep 1997) |
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| rotavirus antigen test | <investigation, microbiology> A test which detects the presence of rotavirus in the stool. This virus is a common cause of childhood gastroenteritis. (17 Dec 1997) |
| rotavirus infections | Infection with any of the rotaviruses. Specific infections include human infantile diarrhoea, neonatal calf diarrhoea, and epidemic diarrhoea of infant mice. (12 Dec 1998) |
| rotavirus stool test | <investigation> A test which detects the presence of rotavirus in the stool. This virus is a common cause of childhood gastroenteritis. (17 Dec 1997) |
| Rotch | Thomas M., U.S. Physician, 1848-1914. See: Rotch's sign. (05 Mar 2000) |
| Rotch's sign | <clinical sign> In pericardial effusion, percussion dullness in the fifth intercostal space on the right. (05 Mar 2000) |
| rotche | <zoology> A very small arctic sea bird (Mergulus alle, or Alle alle) common on both coasts of the Atlantic in winter. Synonym: little auk, dovekie, rotch, rotchie, and sea dove. Source: Websters Dictionary (01 Mar 1998) |
| rotchet | <zoology> The European red gurnard (Trigla pini). Source: Websters Dictionary (01 Mar 1998) |
| rote learning | The learning of arbitrary relationships, usually by repetition of the learning procedure through memorization and without an understanding of the relationships. (05 Mar 2000) |
| rotella | <zoology> Any one of numerous species of small, polished, brightcoloured gastropods of the genus Rotella, native of tropical seas. Origin: NL, dim. Of rota wheel; cf. LL. Rotella a little whell. Source: Websters Dictionary (01 Mar 1998) |
| roteln | Roetheln Synonym: rubella. Origin: Ger. Little red spots, fr. Rot, red, + -el, dim. Suffix (05 Mar 2000) |
| rotenone | <biochemistry> An inhibitor of electron transport that blocks transfer of reducing equivalents from NADH dehydrogenase to coenzyme Q. A very potent poison for fish and for insects. (18 Nov 1997) |
| Roth's disease | meralgia paraesthetica |
| Roth's spots | A round white retina spot surrounded by haemorrhage in bacterial endocarditis, and in other retinal haemorrhagic conditions. (05 Mar 2000) |
| Roth, Moritz | <person> Swiss physician and pathologist, 1839-1914. See: Roth's spots, vas aberrans of Roth. (05 Mar 2000) |