*ribband*

n. [ Rib + band. ] [ Written also riband, and ribbon. ] (Shipbuilding) A long, narrow strip of timber bent and bolted longitudinally to the ribs of a vessel, to hold them in position, and give rigidity to the framework. [ 1913 Webster ]

Rib-band lines, oblique longitudinal sections of the hull of a vessel. Knight. [ 1913 Webster ]