piston

Part of speech: noun

A disk connected with a rod, and fitted to slide in a cylinder, as in a steam - engine.

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Usage examples "piston":

  1. As shown in the engraving, the nut goes on to the rod a couple of threads before it is entered in the piston. - "Modern Machine-Shop Practice, Volumes I and II", Joshua Rose.
  2. The swift, silent play of the great piston and the steady motion of the resistless, revolving shaft, half hypnotized the boy and he stood, dazed and in danger, until called down by the sharp rebuff of the engineer. - "Dick in the Everglades", A. W. Dimock.
  3. Agricola describes a crank- driven piston pump, calling it a new machine invented ten years earlier. - "Mine Pumping in Agricola's Time and Later", Robert P. Multhauf.