Meaning of water-inch

wa•ter-inch

Pronunciation: (wô'tur-inch', wot'ur-), [key]
— n. Hydraulics.
  1. the quantity of water (approx. 500 cubic feet) discharged in 24 hours through a circular opening of one inch diameter leading from a reservoir in which the water is constantly only high enough to cover the orifice.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.