Source : Webster's Revised Unabridged Dictionary (1913)

Extrude \Ex*trude"\, v. t. (Metallurgy)
   To shape or form by forcing metal heated to a semi-plastic
   condition through dies by the use of hydraulic power; as,
   extruded metal, extruded rods, extruded shapes.

Extrude \Ex*trude"\, v. t. [imp. & p. p. {Extruded}; p. pr. &
   vb. n. {Extruding}.] [L. extrudere, extrusum; ex out +
   trudere to thrust, akin to E. threat. See {Threat}.]
   To thrust out; to force, press, or push out; to expel; to
   drive off or away. ``Parentheses thrown into notes or
   extruded to the margin.'' --Coleridge.

Source : WordNet®

extrude
     v : form or shape by forcing through an opening; "extrude steel"
         [syn: {squeeze out}]