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(Science: zoology) 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.

Origin: NL, fr. Gr. Fringe _ tail.