The Collaborative International Dictionary of English v.0.48:

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.]
   1. 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.
      [1913 Webster]

   2. (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.
      [Webster 1913 Suppl.]