| rhabdocyte | Rarely used term for band cell or metamyelocyte. Origin: rhabdo-+ G. Kytos, cell (05 Mar 2000) |
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| rhabdoid | Rod-shaped. Origin: rhabdo-+ G. Eidos, resemblance (05 Mar 2000) |
| rhabdoid tumour | A rare but highly lethal childhood tumour found almost exclusively in infants. Histopathologically, it resembles rhabdomyosarcoma but the tumour cells are not of myogenic origin. Although it arises primarily in the kidney, it may be found in other parts of the body. The rhabdoid cytomorphology is believed to be the expression of a very primitive malignant cell. (12 Dec 1998) |
| rhabdology | <study> The method or art of performing arithmetical operations by means of Napier's bones. See Napier's bones. Alternative forms: rhabdology. Origin: Gr. Rod, stick: cf. F. Rabdologie. Source: Websters Dictionary (01 Mar 1998) |
| rhabdom | <zoology> One of numerous minute rodlike structures formed of two or more cells situated behind the retinulae in the compound eyes of insects, etc. Origin: Gr. A bundle of rods, fr. "rabdos a rod. Source: Websters Dictionary (01 Mar 1998) |
| rhabdomancy | Same as Rabdomancy. Source: Websters Dictionary (01 Mar 1998) |
| rhabdomere | <zoology> One of the several parts composing a rhabdom. Origin: Rhabdom + -mere. Source: Websters Dictionary (01 Mar 1998) |
| rhabdomyoblast | Large round, spindle-shaped, or strap-shaped cells with deeply eosinophilic fibrillar cytoplasm which may show cross striations; found in some rhabdomyosarcomas. Origin: rhabdo-+ G. Mys, muscle, + blastos, germ (05 Mar 2000) |
| 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) |
| 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) |