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Meaning of rainbow runner

rain'bow run"ner

Pronunciation: [key]
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.