| rhabdomyolysis | <pathology> The destruction of skeletal muscle cells. Often the result of electrical injury, alcoholism, injury (or laying in one position for an extended period of time), drug side effects or toxins. (27 Sep 1997) |
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| rhabdomyoma | A benign tumour derived from striated muscle. It is extremely rare, generally occurring in the tongue, neck muscles, larynx, uvula, nasal cavity, axilla, vulva, and heart. These tumours are treated by simple excision. (12 Dec 1998) |
| rhabdomyosarcoma | <oncology, tumour> Malignant tumour (sarcoma) derived from striated muscle. (18 Nov 1997) |
| rhabdomyosarcoma, alveolar | A form of rhabdomyosarcoma occurring mainly in adolescents and young adults, affecting muscles of the extremities, trunk, orbital region, etc. It is extremely malignant, metastasizing widely at an early stage. Few cures have been achieved and the prognosis is poor. "alveolar" refers to its microscopic appearance simulating the cells of the respiratory alveolus. (12 Dec 1998) |
| rhabdomyosarcoma, embryonal | A form of rhabdomyosarcoma arising primarily in the head and neck, especially the orbit, of children below the age of 10. The cells are smaller than those of other rhabdomyosarcomas and are of two basic cell types: spindle cells and round cells. This cancer is highly sensitive to chemotherapy and has a high cure rate with multi-modality therapy. (12 Dec 1998) |
| rhabdophobia | <psychology> Morbid fear of a rod (or switch) as an instrument of punishment. Origin: rhabdo-+ G. Phobos, fear (05 Mar 2000) |
| rhabdophora | <zoology> An extinct division of Hydrozoa which includes the graptolities. Origin: NL, fr. Gr. "rabdos a rod + to bear. Source: Websters Dictionary (01 Mar 1998) |
| rhabdopleura | <zoology> A genus of marine Bryozoa in which the tubular cells have a centralchitinous axis and the tentacles are borne on a bilobed lophophore. It is the type of the order Pterobranchia, or Podostomata Origin: NL, fr. Gr. "rabdos a rod + the side. Source: Websters Dictionary (01 Mar 1998) |
| rhabdosarcoma | <oncology, tumour> A very dangerous cancer which develops from striated muscle tissue. Thereare three major forms: 1. Alveolar rhabdosarcoma: this cancer, which most often afflicts adolescents, typically develops in the extremities, body or eye cavities. 2. Embryonal rhabdosarcoma: this cancer, which strikes infants and young children, develops in the head, neck, extremities or lower genitourinary tract. 3. Pleiomorphic rhabdosarcoma: this cancer strikes adults and typically develops in the extremities. (09 Oct 1997) |
| rhabdosphincter | A sphincter made up of striated musculature. Synonym: striated muscular sphincter. Origin: rhabdo-+ G. Sphinkter, sphincter (05 Mar 2000) |
| Rhabdoviridae | <virology> Class V viruses with a single negative strand RNA genome and an associated virus specific RNA polymerase. The capsid is bullet shaped and enveloped by a membrane that is formed when the virus buds out of the plasma membrane of infected cells. The budded membrane contains host lipids but only glycoproteins coded for by the virus, of which there are usually 1-3 species. In the electron microscope these appear as regularly arranged spikes about 10nm long and are called spike glycoproteins. This group includes rabies virus, vesicular stomatitis virus and a number of plant viruses. (11 Jan 1998) |
| rhabdoviridae infections | Virus diseases caused by rhabdoviridae. Important infections include rabies, ephemeral fever, and vesicular stomatitis. (12 Dec 1998) |
| rhabdovirus | Any virus of the family Rhabdoviridae. (05 Mar 2000) |
| rhachi- | For words so beginning, see rachi-. (05 Mar 2000) |
| rhachiglossa | <zoology> A division of marine gastropods having a retractile proboscis and three longitudinal rows of teeth on the radula. It includes many of the large ornamental shells, as the miters, murices, olives, purpuras, volutes, and whelks. Origin: NL. See Rhachis, and Glossa. Source: Websters Dictionary (01 Mar 1998) |