georeactor

/JH R IY0 AE1 K T ER0/
noun
  1. 1

    Any man-made industrial structure built into the Earth's crust and operating on the principle of nuclear fission.

  2. 2

    A geologically occurring slow fission reactor, especially in the Earth's past.

  3. 3

    The theorized natural fission reactor at the center of the Earth which would account for the geomagnetic field.