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cylinderMain Entry: cyl·in·der Pronunciation: \ˈsi-lən-dər\ Function: noun Etymology: Middle French or Latin; Middle French cylindre, from Latin cylindrus, from Greek kylindros, from kylindein to roll; perhaps akin to Greek kyklos wheel — more at wheel Date: 1570 1 a : the surface traced by a straight line moving parallel to a fixed straight line and intersecting a fixed planar closed curve b : a solid or surface bounded by a cylinder and two parallel planes cutting all its elements; especially : right circular cylinder — see volume table — cyl·in·dered \-dərd\ adjective — on all cylinders : with maximum effort or intensity : at full capacity or speed <the economy is running on all cylinders>
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