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 spring·tail /ˈsprɪŋˌtel/
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 Spring·tail n. Zool. Any one of numerous species of small apterous insects belonging to the order Thysanura. They have two elastic caudal stylets which can be bent under the abdomen and then suddenly extended like a spring, thus enabling them to leap to a considerable distance. See Collembola, and Podura.
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 springtail
      n : any of numerous minute wingless primitive insects possessing
          a special abdominal appendage that allows the
          characteristic nearly perpetual springing pattern; found
          in soil rich in organic debris or on the surface of snow
          or water [syn: collembolan]