Source : Webster's Revised Unabridged Dictionary (1913)

Plication \Pli*ca"tion\, n.
   A folding or fold; a plait. --Richardson.

Source : WordNet®

plication
     n 1: an angular or rounded shape made by folding; "a fold in the
          napkin"; "a crease in his trousers"; "a plication on her
          blouse"; "a flexure of the colon"; "a bend of his elbow"
          [syn: {fold}, {crease}, {flexure}, {crimp}, {bend}]
     2: folding in parallel folds [syn: {pleating}]