hydrodynamic

Meanings

1. 1
   adj

   relating to the motion of liquids and the forces acting on bodies in moving liquids

   The engineers built a hydrodynamic model of water flowing around the hull.

2. 2
   adj

   designed, shaped, or operated according to the force or flow of moving water

   The train used a hydrodynamic brake on the steep descent.

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.

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