Thysanura
  纓尾亞目
  Thys·a·nu·ra n. pl.  Zool. An order of wingless hexapod insects which have setiform caudal appendages, either bent beneath the body to form a spring, or projecting as bristles. It comprises the Cinura, or bristletails, and the Collembola, or springtails. Called also Thysanoura. See Lepisma, and Podura.
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  Thysanura
       n : firebrats; silverfish; machilids [syn: order Thysanura]