composite (material) at English => English (The Britannica Concise) Of Explained:
Solid material that results when two or more different substances, each with its own characteristics, are combined (physically, not chemically) to create a new substance whose properties are superior in a specific application to those of the original components. The term specifically refers to a structural material (such as plastic) within which a fibrous material (such as silicon carbide) is embedded. Glass-fiber-reinforced plastic is the best-known composite. Because of their stiffness, lightness, and heat resistance, composites are the materials of choice in numerous structural, reinforcing, and high-performance applications.