The Collaborative International Dictionary of English v.0.48:

Cancellated \Can"cel*la`ted\, a.
   1. Crossbarred; marked with cross lines. --Grew.
      [1913 Webster]

   2. (Anat.) Open or spongy, as some porous bones.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cancellated
    adj 1: having a latticelike structure pierced with holes or
           windows [syn: cancellate, cancellated, clathrate]
    2: having an open or latticed or porous structure [syn:
       cancellate, cancellated, cancellous]