The Collaborative International Dictionary of English v.0.48:

Phoebus \Ph[oe]"bus\ (f[=e]"b[u^]s), n. [L., fr. Gr. Foi^bos,
   fr. foi^bos pure, bright.]
   1. (Class. Myth.) Apollo; the sun god.
      [1913 Webster]

   2. The sun. "Ph[oe]bus 'gins arise." --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Phoebus
    n 1: (Greek mythology) Greek god of light; god of prophecy and
         poetry and music and healing; son of Zeus and Leto; twin
         brother of Artemis [syn: Apollo, Phoebus, Phoebus
         Apollo]