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Meaning of splittail

split•tail

Pronunciation: (split'tāl"), [key]
— n.
  1. a minnow, Pogonichthys macrolepidotus, of the Sacramento River, having the upper lobe of the tail much longer than the lower lobe: habitat changes have greatly reduced its numbers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.