| Riehl's melanosis | A brown pigmentary condition of the exposed portions of the skin of the neck and face with melanin pigment in dermal macrophages, thought to result from photodermatitis due to materials, such as cosmetic ingredients, or oils encountered in various occupations. (05 Mar 2000) |
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| Riehl, Gustav | <person> Austrian dermatologist, 1855-1943. See: Riehl's melanosis. (05 Mar 2000) |
| rietboc | <zoology> The reedbuck, a South African antelope (Cervicapra arundinacea); so called from its frequenting dry places covered with high grass or reeds. Its colour is yellowish brown. Synonym: inghalla, and rietbok. Origin: D. Riet reed + bok buck. Source: Websters Dictionary (01 Mar 1998) |