hydrodynamic

adj

Etymology: Etymology tree Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Hellenic *údōr Ancient Greek ῡ̆̔́δωρ (hū̆́dōr) Ancient Greek ῠ̔δρο- (hŭdro-)der. English hydro- Proto-Indo-European *dewh₂-der. Proto-Hellenic *dunamai Ancient Greek δῠ́νᾰμαι (dŭ́nămai) Ancient Greek δύναμις (dúnamis) Proto-Indo-European *-kos Ancient Greek -κός (-kós) Ancient Greek -ικός (-ikós) Ancient Greek δυναμικός (dunamikós)lbor. French dynamiqueder. English dynamic English hydrodynamic From hydro- + dynamic.

1. Of, or relating to the science of hydrodynamics.

   “On the descent from Semmering to Payerbach-Reichenau, with a ruling gradient of 1 in 39 [...], the Voith hydrodynamic brake kept the train within the 19 and 23 m.p.h. limitations without recourse to air brakes, [...].”

2. Operated by the force of water in motion.