a mountain range in SE Europe, in the Balkan Peninsula extending along the border between Bulgaria and Greece. Highest peak: Golyam Perelik (Bulgaria), 2191 m (7188 ft)
rhodophylaxis rho·do·phy·lax·is (rō’dō-fə-lāk’sĭs) n. The action of the pigment cells of the choroid of the eye in preserving or facilitating the regeneration of rhodopsin. rho’do·phy·lac’tic (-lāk’tĭk) adj.
noun, Biochemistry. 1. a bright-red photosensitive pigment found in the rod-shaped cells of the retina of certain fishes and most higher vertebrates: it is broken down by the action of dim light into retinal and opsin. noun 1. a red pigment in the rods of the retina in vertebrates. It is dissociated by light into […]
noun 1. a low North American shrub, Rhododendron canadense, of the heath family, having rose-colored flowers that appear before the leaves.
noun, Pathology. 1. an excessive discharge of mucus from the nose. rhinorrhea rhi·nor·rhe·a (rī’nə-rē’ə) n. A discharge from the nasal mucous membrane, espcially if excessive.