Board made from thick corrugated paper.

cardboard with corrugations (can be glued to flat cardboard on one or both sides)

Layers of paper glued together with a ruffled or grooved inner liner. This is the material which makes corrugated cardboard boxes (the most recycled product in the country).

a sturdy three-layer paper board shaped into parallel and alternating ridges and grooves; used in the manufacture of most shipping boxes.

Structural paper material with an inner core shaped in rigid parallel furrows and ridges. Does not refer to linerboard or paperboard such as that use for cereal boxes.

Boxes and other items made of waffle-type corrugated cardboard.