Pronunciation: (hī-drô'lik, -drol'ik), [key]
1. operated by, moved by, or employing water or other liquids in motion.
2. operated by the pressure created by forcing water, oil, or another liquid through a comparatively narrow pipe or orifice.
3. of or pertaining to water or other liquids in motion.
4. of or pertaining to hydraulics.
5. hardening under water, as a cement.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.