HYDRODYNAMICS n.
That branch of the science of mechanics which relates to fluids, or, as usually limited, which treats of the laws of motion and action of nonelastic fluids, whether as investigated mathematically, or by observation and experiment; the principles of dynamics, as applied to water and other fluids.
HYDROMETEOROLOGY n.
That branch of meteorology which relates to, or treats of, water in the atmosphere, or its phenomena, as rain, clouds, snow, hail, storms, etc.
IMPRINT v.
To stamp or mark, as letters on paper, by means of type, plates, stamps, or the like; to print the mark (figures, letters, etc., upon something). Nature imprints upon whate'er we see, That has a heart and life in it, "Be free." Cowper.