retinene2 n. See dehydroretinaldehyde.
noun, Mineralogy. 1. any of various fossil resins, especially one derived from brown coal. noun 1. any of various resins of fossil origin, esp one derived from lignite
noun, Ophthalmology. 1. inflammation of the retina. noun 1. inflammation of the retina retinitis ret·i·ni·tis (rět’n-ī’tĭs) n. Inflammation of the retina.
[pig-men-toh-suh, -muh n-] /ˌpɪg mɛnˈtoʊ sə, -mən-/ noun, Ophthalmology. 1. degeneration of the retina manifested by night blindness and gradual loss of peripheral vision, eventually resulting in tunnel vision or total blindness. retinitis pigmentosa /ˌpɪɡmənˈtəʊsə/ noun 1. a degenerative hereditary disease of the human eye, characterized by pigmentary changes in the retina, night blindness, and […]