The process of pushing or forcing something out, or a shape made by forcing material through an opening.
From Latin 'extrudere' (ex- 'out' + trudere 'to thrust'), the term entered English in the 17th century to describe the mechanical process of shaping materials by forcing them through a die.
Extrusion is how we make everything from plastic pipes to aluminum frames to Play-Doh shapes—it's one of the most important manufacturing techniques in modern industry, yet most people have never heard the word.
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