a multi-coloured flag used as a symbol of peace; often used to represent gay and lesbian pride
- Rainbow lorikeet
noun 1. a small Australasian parrot, Trichoglossus haematodus, with brightly-coloured plumage
- Rainbow nation
noun 1. (South African) an epithet, alluding to its multiracial population, of South Africa
- Rainbow quartz
noun 1. (mineralogy) another name for iris (sense 3)
noun 1. a streamlined, cigar-shaped swift jack, Elagatis bipinnulata, of warm seas, having a blue back, light-colored abdomen, and blue-bordered yellow stripes on its sides: a food and game fish.