The Collaborative International Dictionary of English v.0.48:

Elongate \E*lon"gate\, v. t. [imp. & p. p. Elongated; p. pr. &
   vb. n. Elongating.] [LL. elongatus, p. p. of elongare to
   remove, to prolong; e + L. longus long. See Long, a., and
   cf. Eloign.]
   1. To lengthen; to extend; to stretch; as, to elongate a
      line.
      [1913 Webster]

   2. To remove further off. [Obs.] --Sir T. Browne.
      [1913 Webster]