Of, relating to, or operated by the force of liquid in motion.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hydrodynamic" in a sentence
"Or maybe hard plastic in a "hydrodynamic" (if their is such word) form that could withstand the currents."
"So one possibility is that the melanosomes got bigger during later penguin evolution as the birds became better underwater swimmers and needed a more hydrodynamic covering."
"Like its natural archetype, the AquaPenguin from Festo has a hydrodynamic body contour."