Pha·ë·thon (fā'ə-thŏn', -thən) n.
Greek Mythology A son of the sun god Helios who was killed by Zeus while trying to drive his father's chariot across the sky.
[Latin Phaëtōn, Phaëthōn, from Greek Phaethōn, from phaethōn, present participle of phaethein, to shine; see bhā-1 in Indo-European roots.]