Waterbed (noun)

A type of bed that has a water-filled mattress instead of a traditional spring mattress.

Origin:

Derived from the words 'water' and 'bed' meaning a bed filled with water.

Examples:

1. The waterbed was first patented in the late 19th century, but became popular in the 1970s and 1980s.
2. The waterbed is known for providing a comfortable and adjustable sleeping surface, with the water being able to conform to the shape of the sleeper.
3. The waterbed is often heated, providing warmth and comfort to the sleeper.
4. The waterbed has been criticized for being heavy and difficult to move, as well as for being prone to leaks.
5. The waterbed has been the subject of controversy, with some people loving it for its comfort, and others hating it for its bulk and perceived impracticality.