Sphinx n.
  1. (a) In Egyptian art, an image of granite or porphyry, having a human head, or the head of a ram or of a hawk, upon the wingless body of a lion.
  The awful ruins of the days of old . . .
  Or jasper tomb, or mutilated sphinx.   --Shelley.
  (b) On Greek art and mythology, a she-monster, usually represented as having the winged body of a lion, and the face and breast of a young woman.
  Note: The most famous Grecian sphinx, that of Thebes in Bœotia, is said to have proposed a riddle to the Thebans, and killed those who were unable to guess it. The enigma was solved by Œdipus, whereupon the sphinx slew herself. “Subtle as sphinx.”
  2. Hence: A person of enigmatical character and purposes, especially in politics and diplomacy.
  3. Zool. Any one of numerous species of large moths of the family Sphingidae; -- called also hawk moth.  See also tomato worm.
  Note: ☞ The larva is a stout naked caterpillar which, when at rest, often assumes a position suggesting the Egyptian sphinx, whence the name.
  4. Zool. The Guinea, or sphinx, baboon (Cynocephalus sphinx).
  Sphinx baboon Zool., a large West African baboon (Cynocephalus sphinx), often kept in menageries.
  Sphinx moth. Zool. Same as Sphinx, 3.
  ◄ ►