powerhouse

noun

Etymology: From power + house.

1. A power station; the building housing a power station

   “The new powerhouse comprised two tube turbines with a total capacity of 4,500 kW under 18.3 feet head.”

2. Any source of power, energy or strength; a source of influence or inspiration

   “The company has been a powerhouse in its industry for many years.”

   “The mitochondrion is the powerhouse of the cell.”

3. A very good hand of cards, likely to win.

   “A hand like A-2-3-4 is a powerhouse in Omaha/8, because it can easily make the best low hand and capture half the pot.”