Source : Webster's Revised Unabridged Dictionary (1913)

Lanch \Lanch\ (l[.a]nch), v. t. [imp. & p. p. {Lanched}
   (l[.a]ncht); p. pr. & vb. n. {Lanching}. See {Launch},
   {Lance}.]
   To throw, as a lance; to let fly; to launch.

         See Whose arm can lanch the surer bolt.  --Dryden &
                                                  Lee.