The Collaborative International Dictionary of English v.0.48:

Ravenous \Rav"en*ous\ (r[a^]v"'n*[u^]s), a. [From 2d Raven.]
   1. Devouring with rapacious eagerness; furiously voracious;
      hungry even to rage; as, a ravenous wolf or vulture.
      [1913 Webster]

   2. Eager for prey or gratification; as, a ravenous appetite
      or desire.
      [1913 Webster] -- Rav"en*ous*ly, adv. --
      Rav"en*ous*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ravenousness
    n 1: excessive desire to eat [syn: edacity, esurience,
         ravenousness, voracity, voraciousness]