a mineral, manganese metasilicate, MnSiO 3 , occurring usually in rose-red masses, sometimes used as an ornamental stone; manganese spar.
a brownish translucent mineral consisting of manganese silicate in triclinic crystalline form with calcium, iron, or magnesium sometimes replacing the manganese. It occurs in metamorphic rocks, esp in New Jersey and Russia, and is used as an ornamental stone, glaze, and pigment. Formula: MnSiO3
noun 1. a mountain range in SW Bulgaria. Highest peak, Mus Allah, 9595 feet (2925 meters). 2. Classical Mythology. a maiden skilled in hunting, the companion of Artemis.
- Rhodope mountains
/ˈrɒdəpɪ; rɒˈdəʊ-/ plural noun 1. 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 […]