extrude

What it means

1. To push or thrust out.

   When a printer is extruding and has open spaces in a layer, printers pull the filament back so that stringing does not occur.

   2015, Joan Horvath, Rich Cameron, 3D Printing with MatterControl, page 153

   3 more examples

   It is theorized that when the surface velocity is below certain minimum values the material at the interface between workpieces WP-1 and WP-2 rolls up and extrudes from the interface in the form of long twisted cylindrical projections which are sometimes referred to as "dingle-berries."

   1967, M.R. Calton, Welding of Dispersion-Strengthened Alloys, US Patent 3477117, page 6

   Fire salamanders, which are common on forested hillsides in southern and central Europe, extrude secretions onto their skin containing a neurotoxic alkaloid, Samandarin, when they think they are under attack.

   2012, Caspar Henderson, The Book of Barely Imagined Beings, Granta Books, published 2013, page 6

   Researchers at the University of Warwick have created conductive polycaprolactone (PCL)-based filament by mixing carbon black into melted plastic before it's extruded as filament; they call the result carbomorph.

   2017, Richard Horne, 3D Printing For Dummies

2. transitiveTo form or shape (a metal, plastic etc.) by forcing it through a die or an opening.
3. transitiveTo expel; to drive off.

In a sentence

It is theorized that when the surface velocity is below certain minimum values the material at the interface between workpieces WP-1 and WP-2 rolls up and extrudes from the interface in the form of long twisted cylindrical projections which are sometimes referred to as "dingle-berries."

1967, M.R. Calton, Welding of Dispersion-Strengthened Alloys, US Patent 3477117, page 6

Where it comes from

1. Proto-Indo-European*h₁éǵʰ
2. Proto-Indo-European*h₁éǵʰs
3. Proto-Italic*eks
4. Latinex
5. Latinex-
6. Proto-Indo-European*trewd-
7. Proto-Italic*troudō
8. Latintrūdō
9. Latinextrūdere
10. Englishextrude

Borrowed from Latin extrūdere.