An operating table or surgical table was a flat surface on which surgical procedures were performed.
Awaiting surgery on his brain, a time traveling Pavel Chekov lay on an operating table at Mercy Hospital just prior to being rescued by James T. Kirk, Leonard McCoy, and Gillian Taylor. (Star Trek IV: The Voyage Home)
Thousands of Bajorans died on Crell Moset's surgical tables as a result of his cruel medical experiments. (VOY: "Nothing Human")
In 2372, in an attempt to scare him, The Clown reminded Harry Kim of his having seen a frightened little girl on an operating table when he was nine years old. (VOY: "The Thaw")
In 2373, Doctor Julian Bashir was directed to an extra surgical table he could use to perform an aortal graft. (DS9: "Nor the Battle to the Strong")
Later that year, Bashir used his supposedly having left a patient on the operating table as an excuse to leave Miles O'Brien and Keiko O'Brien alone. (DS9: "The Assignment")
In 2375, Ezri Dax described her transformation after becoming joined with the Dax symbiont as laying down on the operating table one person and waking up a completely different person. (DS9: "Shadows and Symbols")