rotary table
noun
1 Engineering a graduated metal disc used to support a workpiece to enable the operator to drill or cut at exact angular intervals about an axis.
2 Oil Industry (in rotary drilling) a power-driven steel turntable through the middle of which the drill string passes and by which it is turned.
Origin
Mid 19th century; earliest use found in Frederick Simms (1803–1865), engineer and technical writer.