| R17 bacteriophage | Bacteriophage with RNA genome that codes for the enzyme RNA synthetase and for the coat protein, a protein to which the RNA is attached and that is involved in attachment to the bacterium. (18 Nov 1997) |
|---|---|
| Ra | The celebrated radioactive element discovered by Marie and pierre curie in 1898. (12 Dec 1998) |
| raash | <zoology> The electric catfish. Alternative forms: raasch. Origin: Cf. Ar. Ra'ash trembling, tremor. Source: Websters Dictionary (01 Mar 1998) |
| rab gene | 1. <molecular biology> One of the three main groups of ras like genes specifying small GTP-binding proteins (the others are ras and rho). Rab proteins are involved in vesicular traffic and seem to control translocation from donor to acceptor membranes. 2. <cell biology> Gene family in plants responsive to abscisic acid: encode proteins of 15-17 kD. (18 Nov 1997) |
| Rab geranylgeranyltransferase | <enzyme> Multisubunit enzyme that prenylates GTP-binding proteins terminating in cys-x-cys or cys-cys Registry number: EC 2.5.1.- Synonym: rab gg transferase, rab geranylgeranyl transferase (26 Jun 1999) |
| Rab28 GTPase | <chemical> A ras-related GTPase; the 2 isoforms (hrab28s and hrab28l) differ in their c-termini; genbank x78606 Synonym: hrab28s, hrab28l (26 Jun 1999) |
| Rab29 GTPase | <chemical> A ras-related GTPase; genbank x96663; amino acid sequence given in first source (26 Jun 1999) |
| rabate | <veterinary> To recover to the fist, as a hawk. Origin: F. Rabattre to beat down; pref. Re- + abattre. See Abate, and cf. Rebate. Source: Websters Dictionary (01 Mar 1998) |
| rabbeting | Making congruous stepwise cuts on apposing bone surfaces for stability after impaction. Origin: Fr. Raboter, to plane (05 Mar 2000) |
| rabbinism | 1. A rabbinic expression or phraseology; a peculiarity of the language of the rabbins. 2. The teachings and traditions of the rabbins. Origin: Cf. F. Rabbinisme. Source: Websters Dictionary (01 Mar 1998) |
| rabbit | <zoology> Any of the smaller species of the genus Lepus, especially the common European species (Lepus cuniculus), which is often kept as a pet, and has been introduced into many countries. It is remarkably prolific, and has become a pest in some parts of Australia and New Zealand. The common American rabbit (L. Sylvalica) is similar but smaller. See Cottontail, and Jack rabbit, under 2d Jack. The larger species of Lepus are commonly called hares. See Hare. <zoology> Angora rabbit The northern chimaera (Chimaera monstrosa). Any one of several species of plectognath fishes, as the bur fish, and puffer. The term is also locally applied to other fishes. Rabbits' ears. <botany> See Daman, and Klipdas. Welsh rabbit, a dish of which the chief constituents are toasted bread and toasted cheese, prepared in various ways. The name is said to be a corruption of Welsh rare bit, but perhaps it is merely a humorous designation. Origin: OE. Abet, akin to OD. Robbe, robbeken. Source: Websters Dictionary (01 Mar 1998) |
| rabbit fever | <infectious disease, microbiology> A rare infection of rabbits and rodents caused by the bacteria Francisella tularensis. Francisella tularensis is found in many animals (rabbits, rodents) and may be transmitted by direct contact or via insect bite (ticks and deer-fly). Humans can also contract the illness via the direct contact with the infected animal carcass (break in the skin). The illness is characterised by an ulcerative lesion at the site of the inoculation with regional lymph node swelling, pneumonia, fever, chills, headache, muscle pains and joint stiffness. Risk factors include an exposure to rabbits or recent tick bite. A vaccine is available for high risk workers. Treatment is with streptomycin or tetracycline. Tularaemia is fatal in 5% of untreated cases and in less than 1% of treated cases. Incidence: less than 200 cases per year (USA). Origin: Gr. Haima = blood (18 Jul 2002) |
| rabbit fibroma | A connective tissue tumour of cottontail rabbits caused by a poxvirus of the genus Leporipoxvirus and found by Shope to be transmissible with cellular suspensions or Berkefeld filtrates; it is related to myxomatosis and is used in Europe as a source of vaccine to protect against the myxoma virus. Synonym: rabbit fibroma. (05 Mar 2000) |
| rabbit fibroma virus | A poxvirus of the genus Leporipoxvirus, closely related to vaccinia and myxoma viruses, that causes Shope fibroma. Synonym: fibromatosis virus of rabbits, Shope fibroma virus. (05 Mar 2000) |
| rabbit haemorrhagic disease | A highly infectious disease of rabbits, caused by a calicivirus and characterised by haemorrhagic lesions, particularly affecting the lungs and liver; since it was first identified in China in 1984, it has been reported from Korea, it has spread through Europe, and it has reached North Africa and Mexico. (05 Mar 2000) |