pyrophile

Century Dictionary and Cyclopedia

1. n. A lover of fire; specifically, one who explains volcanoes by the natural internal heat of the earth, as opposed to electrical or other cause contributed from outside.

Wiktionary

1. n. A creature that likes and delights in the presence of fire
2. n. dated, rare A person who accepts that the energy of volcanos originates from the heat of the Earth's interior
3. n. A pyromaniac