phaëton

/F AE0 T AH0 N/
noun
  1. 1

    A hypothetical planet between Mars and Jupiter, whose destruction led to the production of the asteroid belt.

  2. 2

    Alternative form of Phaëthon. [(Greek mythology) The son of the sun god Helios who was killed by Zeus while driving his father's chariot uncontrolledly across the sky.]