The Collaborative International Dictionary of English v.0.48:

Philomela \Phil`o*me"la\, n. [L. philomela, Gr. filomh`la,
   according to the legend, from Filomh`la Philomela (daughter
   of Pandion, king of Athens), who was changed into a
   nightingale.]
   1. The nightingale; philomel. --Shak.
      [1913 Webster]

   2. (Zool.) A genus of birds including the nightingales.
      [1913 Webster]