from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The branch of science that deals with the dynamics of fluids, especially incompressible fluids, in motion.
  • noun The dynamics of fluids in motion.

from The Century Dictionary.

  • noun The mathematical theory of the application of the principles of dynamics to fluids.

from the GNU version of the Collaborative International Dictionary of English.

  • noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun physics the scientific study of fluids in motion

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun study of fluids in motion


Sorry, no etymologies found.


  • Furthermore, magneto-hydrodynamics is important in discussing the problem of how the central body in a plasma cloud can develop into a sun and system of planets, or in investigations of stability conditions for a plasma consisting of electrons and ions moving at relativistic velocities interacting with cosmic fields.

    Nobel Prize in Physics 1970 - Presentation Speech

  • Prof. Walton's first researches involved theoretical and experimental studies in hydrodynamics and, at the Cavendish

    Ernest T.S. Walton - Biography

  • Liquid crystals have been known for over a century and their hydrodynamics, that is, how they flow, were studied as early as the 1920s by Professor Wilhelm Oseen of Uppsala.

    Press Release: The 1991 Nobel Prize in Physics

  • Nevertheless, one feels that the hydrodynamics of Formula 1 cars displacing both air and a surface layer of water, is a science which has yet to be fully explored or exploited.

    Archive 2009-05-01

  • I would probably be one of the last people to disagree with the “universal nature of gravity”, but claiming that it is because the equations, in one particular form, resemble the laws of thermodynamics and hydrodynamics is quite unreasonable.

    The Language of Science – it’s “just a theory”

  • The universal nature of gravity is also demonstrated by the fact that its basic equations closely resemble the laws of thermodynamics and hydrodynamics.

    The Language of Science – it’s “just a theory”

  • The Atomic Weapons Establishment at Aldermaston in Berkshire will develop hydrodynamics technology, while its equivalent, the Centre for Nuclear Studies, at Valduc in Burgundy, will do the actual tests.

    Anglo-French defence deal is a triumph of pragmatism over ideology

  • The magneto-hydrodynamics of jets occurs from the huge heating of material falling onto a black hole.

    World-wide Campaign Sheds New Light on Nature's "LHC" | Universe Today

  • A wag once commented (and I have quoted here often) that to expect a scientist to understand the philosophy of science is like expecting a fish to understand hydrodynamics.

    Boing Boing

  • The details (e.g., depth and wavelength) involve the fluid dynamics of the situation (fluid speed and density, particle aero/hydrodynamics, particle interactions, etc.)

    Sand dune - The Panda's Thumb


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