an orange to red, heavy, earthy, water-insoluble, poisonous powder, Pb 3 O 4 , obtained by heating litharge in the presence of air: used chiefly as a paint pigment, in the manufacture of glass and glazes, and in storage batteries.
a bright-red poisonous insoluble oxide of lead usually obtained as a powder by heating litharge in air. It is used as a pigment in paints. Formula: Pb3O4 Also called minium
noun 1. a plant, Delphinium nudicaule, of the buttercup family, native to the western coast of the U.S., having orange-red or sometimes yellow flowers.
noun, adjective, Chemistry. 1. oxidation-reduction. noun 1. (modifier) another term for oxidation-reduction redox re·dox (rē’dŏks’) n. See oxidation-reduction.
noun, Mineralogy. 1. zincite. noun 1. a brittle, deep-red to orange-yellow mineral, native zinc oxide, ZnO, usually massive or granular: formerly an important ore of zinc. noun 1. a red or yellow mineral consisting of zinc oxide in hexagonal crystalline form. It occurs in metamorphosed limestone. Formula: ZnO
- Red packet
noun (in China and other East Asian countries) 1. a sum of money folded inside red paper and given at the Chinese New Year to unmarried younger relatives 2. such a gift given at Chinese weddings by the parents to the bride and groom and by the bride and groom to unmarried younger relatives