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]