D defs.my
Entry 1 sense Webster, 1913

deckle

/(dĕk"k'l)/ · dec·kle · IPA /ˈdɛkəl/
01 n. 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 …
  1. 1.
    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.(Paper Making)