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):

voraciously
    adv 1: in an eagerly voracious manner; "she reads voraciously"