The Collaborative International Dictionary of English v.0.48:

Limitary \Lim"i*ta*ry\, n.; pl. limitaries
   (l[i^]m"[i^]*t[asl]*r[i^]z).
   1. That which serves to limit; a boundary; border land.
      [Obs.] --Fuller.
      [1913 Webster]

   2. A limiter. See Limiter, 2.
      [1913 Webster]