Source : Webster's Revised Unabridged Dictionary (1913)

Ravenous \Rav"en*ous\, a. [From 2d {Raven}.]
   1. Devouring with rapacious eagerness; furiously voracious;
      hungry even to rage; as, a ravenous wolf or vulture.

   2. Eager for prey or gratification; as, a ravenous appetite
      or desire. -- {Rav"en*ous*ly}, adv. -- {Rav"en*ous*ness},
      n.

Source : WordNet®

ravenousness
     n : excessive desire to eat [syn: {edacity}, {esurience}, {voracity},
          {voraciousness}]