| rhodo- | Rosy, red colour. Origin: G. Rhodon, rose (05 Mar 2000) |
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| rhodobacter | A genus of gram-negative bacteria widely distributed in fresh water as well as marine and hypersaline habitats. (12 Dec 1998) |
| rhodobacter capsulatus | Non-pathogenic ovoid to rod-shaped bacteria that are widely distributed and found in fresh water as well as marine and hypersaline habitats. (12 Dec 1998) |
| rhodobacter sphaeroides | Spherical phototrophic bacteria found in mud and stagnant water exposed to light. (12 Dec 1998) |
| 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) |
| 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) |