powerhouse

noun4

1. •
   A power station; the building housing the core parts of a power station, such as the dynamo.

   • The new powerhouse comprised two tube turbines with a total capacity of 4,500 kW under 18.3 feet head. — 1986
2. •
   The muscles that give stability to the human torso and its relationship to the limb movements.
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. — 2011
4. •
   (figurative) 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.