Source : Webster's Revised Unabridged Dictionary (1913)

Deckle \Dec"kle\, n. [Cf. G. deckel cover, lid.] (Paper Making)
   A separate thin wooden frame used to form the border of a
   hand mold, or a curb of India rubber or other material which
   rests on, and forms the edge of, the mold in a paper machine
   and determines the width of the paper. [Spelt also {deckel},
   and {deckle}.]

Source : WordNet®

deckle
     n 1: rough edge left by a deckle on handmade paper or produced
          artificially on machine-made paper [syn: {deckle edge}]
     2: (paper making) a frame used to form paper pulp into sheets

Source : Free On-Line Dictionary of Computing

deckle
     
        /dek'l/ (From "dec-" and "{nibble}"; the original spelling
        seems to have been "decle") Two {nickle}s; 10 {bit}s.
        Reported among developers for {Mattel}'s {GI 1600} (the
        {Intellivision} games processor), a chip with 16-bit wide
        {RAM} but 10-bit wide {ROM}.
     
        [{Jargon File}]
     
        (1994-11-23)