MEANING: noun:
1. An enclosed area on a boat or ship that houses the steering wheel.
2. In baseball, the area in which it’s easiest for the batter to hit the ball with the most power.
3. One’s area of interest or expertise.

ETYMOLOGY: The term has its origins in nautical lingo in which a wheelhouse is a synonym for a pilothouse. From water the term evolved to the land: in baseball, it’s an area of a batter’s greatest striking power. From there, the term took a broader sense. Earliest documented use: 1835.

WHEEL HOSE - device for firemen to use so their hoses don't get tangled

WHEEL-HORSE - equine used to power an early kind of mill

THE EL HOUSE - storage yard for Chicago public elevated-transit cars