noun 2.Hydrodynamics. an
expression of the
conservation of energy in streamline flow, stating that the sum of the ratio of the pressure to the mass density, the product of the gravitational constant and the vertical height, and the square of the velocity divided by 2 are constant.
Origin: 1920–25; (in def 1) named after Jakob
Bernoulli;
(in def 2) named after Daniel
Bernoulli