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racerunner

[reys-ruhn-er]
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noun
  1. a whiptail lizard, Cnemidophorus sexlineatus, common in the eastern and central U.S., that runs with great speed.

Origin of racerunner

First recorded in 1640–50; race1 + runner
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018