hydrometrical, a. [Cf. F. hydromètrique.].
Hydrometric pendulum, a species of hydrometer consisting of a hollow ball of ivory or metal suspended by a treated from the center of a graduated quadrant, and held in a stream to measure the velocity of the water by the inclination given to the thread; a kind of current gauge.
Of or pertaining to an hydrometer, or to the determination of the specific gravity of fluids. [1913 Webster]
Of or pertaining to measurement of the velocity, discharge, etc., of running water. [1913 Webster]
Made by means of an hydrometer; as, hydrometric observations. [1913 Webster]