The Collaborative International Dictionary of English v.0.48:

Voracious \Vo*ra"cious\, a. [L. vorax, -acis, fr. vorare to
   devour; akin to Gr. ? meat, food, ? to devour, Skr. gar. Cf.
   Devour.]
   Greedy in eating; very hungry; eager to devour or swallow;
   ravenous; gluttonous; edacious; rapacious; as, a voracious
   man or appetite; a voracious gulf or whirlpool. --Dampier. --
   Vo*ra"cious*ly, adv. -- Vo*ra"cious*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

voraciousness
    n 1: excessive desire to eat [syn: edacity, esurience,
         ravenousness, voracity, voraciousness]
    2: extreme gluttony [syn: edacity, esurience,
       rapaciousness, rapacity, voracity, voraciousness]
    3: an excessive desire for wealth (usually in large amounts);
       "the greediness of lawyers" [syn: greediness,
       voraciousness, rapaciousness]