| billet [`bil·ǝt] ENGINEERING In a hydraulic extrusion press, a large cylindrical cake of plastic material placed within the pressing chamber. METALLURGY A semifinished, short, thick bar of iron or steel in the form of a cylinder or rectangular prism produced from an ingot; limited to 1.5 inches (3.8 centimeters) in width and thickness with a cross-sectional area up to 36 square inches (232 square centimeters). |