A machine or tool that pushes or forces material through an opening or die to create shaped objects.
From extrude plus -er, a suffix indicating 'one who does' or 'a thing that does.' This productive suffix turns verbs into agent nouns, from Latin -ar or -ator.
3D printers are basically high-tech extruders—they force melted plastic through a tiny nozzle, layer by layer, which is exactly the same principle that plastic injection molders and aluminum fabricators have used for decades. The technology just got digital!
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