hy ‧ draul ‧ ics /haɪˈdrɒlɪks, -ˈdrɔː- $ -ˈdrɒː-/ BrE AmE noun
1 . [plural] parts of a machine or system that use the pressure of water or other liquids to move or lift things
2 . [uncountable] the study of how to use the pressure of water or other liquids to produce power