| rhodochrosite | <chemical> Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite. Synonym: dialogite. Origin: Gr. "rodon the rose + a colouring. Source: Websters Dictionary (01 Mar 1998) |
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| rhodococcus | A bacterial genus of the order actinomycetales. (12 Dec 1998) |
| rhodococcus equi | A species of rhodococcus found in soil, herbivore dung, and in the intestinal tract of cows, horses, sheep, and pigs. It causes bronchopneumonia in foals and can be responsible for infection in humans compromised by immunosuppressive drug therapy, lymphoma, or aids. (12 Dec 1998) |
| rhodocrinite | <paleontology> A rose encrinite. Origin: Gr. "rodon rose + lily. Source: Websters Dictionary (01 Mar 1998) |
| rhododendron | <botany> A genus of shrubs or small trees, often having handsome evergreen leaves, and remarkable for the beauty of their flowers; rosebay. Origin: L, fr. Gr. "rododendron, literally, rose tree; "rodon rose + dendron tree. See Rose. Source: Websters Dictionary (01 Mar 1998) |
| rhodogenesis | The production of rhodopsin by the combination of 11-cis-retinal and opsin in the dark. Origin: rhodopsin + G. Genesis, production (05 Mar 2000) |
| rhodonite | <chemical> Manganese spar, or silicate of manganese, a mineral occuring crystallized and in rose-red masses. It is often used as an ornamental stone. Origin: Gr. "rodon the rose. Source: Websters Dictionary (01 Mar 1998) |
| rhodophane | <physiology> The red pigment contained in the inner segments of the cones of the retina in animals. See Chromophane. Origin: Gr. "rodon the rose + to show. Source: Websters Dictionary (01 Mar 1998) |
| rhodophylactic | Relating to rhodophylaxis. (05 Mar 2000) |
| rhodophylaxis | The action of the pigment cells of the choroid in preserving or facilitating the reproduction of rhodopsin. Origin: rhodopsin + G. Phylaxis, a guarding (05 Mar 2000) |
| Rhodophyta | <botany> Division of algae, many of which have branching filamentous forms and red colouration. The latter is due to the presence of phycoerythrin. The food reserve is floridean (starch), found outside the plastid. The walls contain sulphated galactans such as carrageenan and agar. (23 Aug 1998) |
| rhodopseudomonas | A genus of gram-negative, rod-shaped, phototrophic bacteria found in aquatic environments. Internal photosynthetic membranes are present as lamellae underlying the cytoplasmic membrane. (12 Dec 1998) |
| rhodopsin | <protein> Light sensitive pigment formed from retinal linked through a Schiff's base to opsin: rhodopsin is an integral membrane protein found in the discs of retinal rods and cones, comprising some 40% of the membrane. Vertebrate opsins are proteins of 38 kD. See: bacteriorhodopsin. (18 Nov 1997) |
| rhodopsin kinase | <enzyme> Resembles retinal s-antigen in capacity to induce uveitis in experimental animals; isolated from rod photoreceptors; human enzyme 92% identical to bovine enzyme Registry number: EC 2.7.1.125 Synonym: opsin kinase (26 Jun 1999) |
| rhodoquinone oxidoreductase | <enzyme> Couples rotenone-sensitive NADH oxidation with etf and the subsequent reduction of 2-methyl branched-chain enoyl-coas Registry number: EC 1.- Synonym: electron-transfer flavoprotein-rhodoquinone oxidoreductase, etf-ro (26 Jun 1999) |