cancellate

from WordNet (r) 3.0 (2006)

cancellate
    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}]

from The Collaborative International Dictionary of English v.0.48

Cancellate \Can"cel*late\, a. [L. cancellatus, p. p. of
   cancellare, See {Cancel}, v. t.]
   1. (Bot.) Consisting of a network of veins, without
      intermediate parenchyma, as the leaves of certain plants;
      latticelike.
      [1913 Webster]

   2. (Zool.) Having the surface coveres with raised lines,
      crossing at right angles.
      [1913 Webster]