| rubidine | <chemistry> A nitrogenous base homologous with pyridine, obtained from coal tar as an oily liquid, also, any one of the group od metameric compounds of which rubidine is the type. Structure: C11H17N (17 Mar 1998) |
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| rubidium | <chemistry, element> A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Origin: NL, fr. L. Rubidus red, fr. Rubere to be red. So called from two dark red spectroscopic lines by means of which it was discovered in the lepidolite from Rozena, Moravia. Abbreviation: Rb (17 Mar 1998) |
| rubidium radioisotopes | Unstable isotopes of rubidium that decay or disintegrate emitting radiation. Rb atoms with atomic weights 79-84, and 86-95 are radioactive rubidium isotopes. (12 Dec 1998) |
| rubidomycin | An antibiotic used as an antineoplastic; similar to doxorubicin in antitumour activity and in exhibiting cumulative cardiotoxicity. Synonym: daunorubicin (05 Mar 2000) |
| rubiginous | <botany> Having the appearance or colour of iron rust; rusty-looking. Origin: L. Rubiginosus, fr. Rubigo, robigo, rust: cf. F. Rubigineux. Source: Websters Dictionary (01 Mar 1998) |
| rubigo | <botany> Same as Rust. Origin: L. Rubigo, robigo, rust of metals, rust, blight. Source: Websters Dictionary (01 Mar 1998) |
| Rubin | Isidor C., U.S. Gynecologist, 1883-1958. See: Rubin test. (05 Mar 2000) |
| rubin S | A mixture of the sodium salts bi-and trisulfonic acids of rosanilin and pararosanilin; used as an indicator dye and for staining of cytoplasm and collagen. Synonym: rubin S, rubine. (05 Mar 2000) |
| Rubin test | An obsolete test of patency of the fallopian tubes; a cannula is introduced into the cervix uteri, and carbon dioxide gas is passed through the cannula by means of a syringe with manometer attachment; if the tubes are patent, the escape of gas into the abdominal cavity is evidenced by a high-pitched bubbling sound heard on auscultation over the lower abdomen, or free gas under the diaphragm can be demonstrated by X-ray. (05 Mar 2000) |
| Rubinstein, Jack | <person> U.S. Child psychiatrist and paediatrician, *1925. See: Rubinstein-Taybi syndrome. (05 Mar 2000) |
| rubinstein-taybi syndrome | <syndrome> An autosomal recessive disorder usually occurring in males and characterised mainly by motor and mental retardation, broad thumbs, webbing of fingers and toes, facial and skeletal abnormalities. (12 Dec 1998) |
| rubiretin | <chemistry> One of the red dye products extracted from madder root, and probably identical with ruberythrinic acid. Origin: Rubian + Gr. Resin. Source: Websters Dictionary (01 Mar 1998) |
| rubivirus | A genus of the family togaviridae containing only one recognised species, rubella virus. Transmission is primarily by aerosolization. (12 Dec 1998) |
| rubivirus infections | Virus diseases caused by the rubivirus genus, of the family togaviridae. (12 Dec 1998) |
| Rubner | Max, German hygienist and biochemist, 1854-1932. See: Rubner's laws of growth, Rubner's test. (05 Mar 2000) |