Racerunner definitions

rās'rŭn'ər
Any of several swift teiid lizards, especially Aspidoscelis sexlineata (syn. Cnemidophorus sexlineatus ) of the United States and northern Mexico, having a brownish body with longitudinal light-colored stripes.
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Any of a genus (Cnemidophorus, family Teiidae) of very active, long-tailed lizards, found chiefly in warm regions of North and South America.
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