three-ply

[ three-plahy ]

/ ˈθriˈplaɪ /

consisting of three thicknesses, laminations, strands, or the like.

Origin of three-ply

First recorded in 1865–70

All wood should be planed, and in cases other than three-ply should be of stout wood, not less than 5⁄8 inch in thickness.

The Preparation of Plantation Rubber |Sidney Morgan
Reynolds's three-ply and four-ply bristol board affords a satisfactory surface for brush and pencil drawings.

The Preparation of Illustrations for Reports of the United States Geological Survey |John L. Ridgway
Draw on cardboard or three-ply wood and cut out the head and body of the clown as in Fig. 403.

Toy-Making in School and Home |Ruby Kathleen Polkinghorne and Mabel Irene Rutherford Polkinghorne
The roof was covered with three-ply mats and lapped over a little more than half, as shown diagrammatically on the drawing.

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 |F. Lavis

Animals with movable limbs can also be cut from three-ply wood (see Part II) or cardboard.

Toy-Making in School and Home |Ruby Kathleen Polkinghorne and Mabel Irene Rutherford Polkinghorne

three-ply

having three layers or thicknesses