| extrusion [ek`strü·zhǝn] ENGINEERING A process in which a hot or cold semisoft solid material, such as metal or plastic, is forced through the orifice of a die to produce a continuously formed piece in the shape of the desired product. GEOLOGY Emission of magma or magmatic materials at the surface of the earth. TEXTILES A process for making continuous-filament synthetic fibers by forcing a syruplike liquid through minute holes of a spinneret. |