Source : Webster's Revised Unabridged Dictionary (1913)

Filmy \Film"y\, a.
   Composed of film or films.

         Whose filmy cord should bind the struggling fly.
                                                  --Dryden.

Source : WordNet®

filmy
     adj : so thin as to transmit light; "a hat with a diaphanous
           veil"; "filmy wings of a moth"; "gauzy clouds of
           dandelion down"; "gossamer cobwebs"; "sheer silk
           stockings"; "transparent chiffon"; "vaporous silks"
           [syn: {diaphanous}, {gauzy}, {gossamer}, {see-through},
            {sheer}, {transparent}, {vaporous}, {cobwebby}]
     [also: {filmiest}, {filmier}]