fenestrate

from The Collaborative International Dictionary of English v.0.48

Fenestrate \Fe*nes"trate\, a. [L. fenestratus, p. p. of
   fenestrare to furnish with openings and windows.]
   1. Having numerous openings; irregularly reticulated; as,
      fenestrate membranes; fenestrate fronds.
      [1913 Webster]

   2. (Zool.) Having transparent spots, as the wings of certain
      butterflies.
      [1913 Webster]