Source : Webster's Revised Unabridged Dictionary (1913)

Convellent \Con*vel"lent\, a. [L. convellens, p. pr. of
   convellere. See {Convulse}.]
   Tending to tear or pull up. [Obs.]

         The ends of the fragment . . . will not yield to the
         convellent force.                        --Todd &
                                                  Bowman.