Engineered boar or engineered hardwood come in a few varieties. You may know it as mass timber, man-made wood, hardwood composite or companies might market them as something totally different. But they are all more or less the same build where planks are a composite of real woods pieced together in alternating directions.
Much like vinyl or laminate planks, engineered hardwood is made up of multiple layers. The difference is that instead of a graphic image layer of wood grain, mass timber has actual hardwood on top.