**Type:** Word
**Level:** C2
**Part of speech:** adj
**IPA (US):** /ˌhaɪ.droʊ.daɪˈnæm.ɪk/
**IPA (UK):** /ˌhaɪ.drəʊ.daɪˈnæm.ɪk/
**Frequency rank:** 119490

## Meanings
1. relating to the motion of liquids and the forces acting on bodies in moving liquids
2. designed, shaped, or operated according to the force or flow of moving water

## Examples
- The engineers built a hydrodynamic model of water flowing around the hull.
- The train used a hydrodynamic brake on the steep descent.

## Synonyms
- fluid-dynamic
- water-powered

## Antonyms
- hydrostatic

## Derived Forms
- hydrodynamically
- hydrodynamicist
- electrohydrodynamic
- magnetohydrodynamic
- microhydrodynamic

## Related Forms
- hydrodynamics
- fluid dynamics
- hydrostatic
- aerodynamic

## Etymology
Formed from hydro- + dynamic. Hydro- comes from Greek hydor ("water"), while dynamic ultimately comes from Greek dynamis ("power, force"). The compound therefore concerns forces in moving water or, more broadly, in liquids.

## Topics
- Science & Research

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