What is "laminated arch"

laminated \lam"i*na`ted\, a.

1. Consisting of, or covered with, laminae, or thin plates, sheets, scales, or layers, one over another; laminate.

2. Hence: Constructed of thin sheets of material, bonded together to form a composite structure having multiple layers.

   Laminated arch (Arch.), a timber arch made of layers of bent planks secured by treenails.