hy ‧ draul ‧ ic /haɪˈdrɒlɪk, -ˈdrɔː- $ -ˈdrɒː-/ BrE AmE adjective [usually before noun]
[ Date: 1600-1700 ; Language: Latin ; Origin: hydraulicus , from Greek , from hydraulis 'organ worked by water' ]
moved or operated by the pressure of water or other liquid:
a hydraulic pump
hydraulic brakes
—hydraulically /-kli/ adverb