عُكْنَةٌ

A crease, or wrinkle, in the belly, originating from fatness: plural عُكَنٌ (S, Mgh, Msb, K) and (S, Msb) sometimes they said (Msb) أَعْكَانٌ [which is a plural of pauc.]. (S, Msb, TA.)

عُكَنُ الدِّرْعِ means The folds of the coat of mail: so in a verse cited voce أَخْنَسُ: one says دِرْعٌ ذَاتُ عُكَنٍ [A coat of mail having folds] when it is wide, folding upon the wearer by reason of its width. (TA.)