Meaning of rainbow darter

rain'bow dart"er

Pronunciation: [key]
  1. a stout darter, Etheostoma caeruleum, inhabiting the Great Lakes and Mississippi River drainages, the spawning male of which has the sides marked with oblique blue bars with red interspaces. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.