noun (used with a singular verb)
the branch of hydrodynamics that deals with the laws governing liquids or gases in motion.
Origin of hydrokinetics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(functioning as singular) the branch of science concerned with the mechanical behaviour and properties of fluids in motion, esp of liquidsAlso called: hydrodynamics
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012