engine room

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engine room (plural engine rooms)

1. (nautical) A compartment on a ship in which the engine machinery is located.

   Synonym: engineering

2. (figurative) The source of power in a team or other group.
   1. (sports) The midfield.
   2. (rugby union) The pair of locks in a team.
   3. (rugby league) The front row.
   4. (music) The rhythm section of a steel band.
      • 2018, Polly Thomas, The Rough Guide to Trinidad and Tobago‎, Apa Publications, →ISBN:

        And no steel band would be complete without its rhythm section or engine room, as the percussion section is known.

• engine bay
• engine compartment