0 the process of forming something by forcing or pushing it out, especially through a small opening: --
Extrusions are limited to straight lines and arcs, so you can't create spirals this way.
The company is an industrial manufacturer of aluminum extrusions.
He began to sweat, a weird cold extrusion of moisture that began to trickle down his face.
The lava dome in the 8,364-foot mountain may be weakened and more likely to allow an explosion or extrusion of lava.