from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Generating electricity by conversion of the energy of running water.
- adj. Of, relating to, or using electricity so generated.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. that generates electricity by converting the energy of moving water
- adj. of or relating to the electricity so produced
hydro- + electric (Wiktionary)