- waterwheel, water wheel - a wheel with buckets attached to its rim; raises water from a stream or pond
--1 is a kind of wheel
- waterwheel, water wheel - a wheel that rotates by direct action of water; a simple turbine
--2 is a kind of wheel
--2 is a part of water mill
--2 has parts: bucket, pail
--2 has particulars: millwheel; noria