The Collaborative International Dictionary of English v.0.48:

Terminable \Ter"mi*na*ble\ (-m[i^]n*[.a]*b'l), a. [See
   Terminate.]
   Capable of being terminated or bounded; limitable. --
   Ter"mi*na*ble*ness, n.
   [1913 Webster]

   Terminable annuity, an annuity for a stated, definite
      number of years; -- distinguished from life annuity, and
      perpetual annuity.
      [1913 Webster]