The Collaborative International Dictionary of English v.0.48:

Liquidize \Liq"uid*ize\ (l[i^]k"w[i^]d*[imac]z), v. t. [imp. &
   p. p. Liquidized (-[imac]zd); p. pr. & vb. n. Liquidizing
   (-[imac]`z[i^]ng).]
   To render liquid.
   [1913 Webster]

WordNet (r) 3.0 (2006):

liquidize
    v 1: get rid of all one's merchandise [syn: sell out, sell
         up, liquidize]
    2: make (a solid substance) liquid, as by heating; "liquefy the
       silver" [syn: liquefy, liquify, liquidize, liquidise]