Heterogeneous is a descriptive word meaning that a product is composed of two or more materials. The prefix hetero- means different or dissimilar. The suffix -geneous means origin, stock, or kind.
Carpet, luxury vinyl tile, and engineered hardwood are each examples of a heterogeneous flooring product. The top and bottom are different in appearance. Two benefits of a heterogeneous flooring products are that the heterogeneous products are usually more dimensionally stable and that they are usually less expensive than the alternative.