Source : Webster's Revised Unabridged Dictionary (1913)

Protrude \Pro*trude"\, v. t. [imp. & p. p. {Protruded}; p. pr. &
   vb. n. {Protruding}.] [L. protrudere, protrusum; pro forward
   + trudere to thrust. See {Threat}.]
   1. To thrust forward; to drive or force along. --Locke.

   2. To thrust out, as through a narrow orifice or from
      confinement; to cause to come forth.

            When . . . Spring protrudes the bursting gems.
                                                  --Thomson.

Source : WordNet®

protruding
     adj : extending out above or beyond a surface or boundary; "the
           jutting limb of a tree"; "massive projected
           buttresses"; "his protruding ribs"; "a pile of boards
           sticking over the end of his truck" [syn: {jutting}, {projected},
            {projecting}, {sticking(p)}, {sticking out(p)}]