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1560s, from Middle French cylindre (14c.), from Latin cylindrus "roller, cylinder," from Greek kylindros "a cylinder, roller, roll," from kylindein "to roll," of unknown origin.
cylinder cyl·in·der (sĭl'ən-dər)
The surface generated by a straight line intersecting and moving along a closed plane curve, the directrix, while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix.
A solid bounded by two parallel planes and such a surface, especially such a surface having a circle as its directrix.
A cylindrical or rodlike renal cast.
A cylindrical lens.
A cylindrical metal container for gases stored under high pressure.