Meaning of Torricelli's law

Tor'ricel'li's law'

Pronunciation: [key]
— Physics. Physics.
  1. the law that states that the speed of flow of a liquid from an orifice is equal to the speed that it would attain if falling freely a distance equal to the height of the free surface of the liquid above the orifice.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.