Hȳ'dro-mĕt'ric or Hȳ'dro-mĕt'ric-al, a.
a. [Fr. hydrométrique.]
Sense 1. Pertaining to an hydrometer, or to the determination of the specific gravity of fluids.
Sense 2. Pertaining to the measurement of the velocity, discharge, &c., of running water.
Sense 3. Made by means of an hydrometer; as, hydrometrical observations.
Hydrometric pendulum, a species of hydrometer consisting of a hollow ball of ivory or metal suspended by a thread from the center of a graduated quadrant, and used to measure the velocity of a stream by the inclination given to the thread when the ball is immersed in the water.