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rainbow runner

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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.
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Origin of rainbow runner

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018