water power

water power (usually uncountable, plural water powers)

1. Used other than with a figurative or idiomatic meaning: see water,‎ power.
2. (uncountable) Mechanical or electrical energy derived from running or falling water; originally obtained from a waterwheel immersed in a stream; modern hydroelectric power is obtained from turbines fed from reservoirs
3. (countable) A site capable of generating power or the right to use a site to generate power.

• (mechanical or electrical power derived from water): hydropower

• hydroelectricity