Earlier Reic wrote
Is plywood defined somewhere as a composite? To me, it's not a
composite because it's just one material, glued together in distinct
layers, not in a matrix like fiberglass and epoxy.


One of the most common *Composite* examples is the cardboard box. Same
material, although the center core is shaped to form the required seperation,
then add the glue and we have a very cheap composite structure.
JJ Sinclair