The Collaborative International Dictionary of English v.0.48:

Saccate \Sac"cate\, a. [NL. saccatus, fr. L. saccus a sack,
   bag.]
   1. (Biol.) Having the form of a sack or pouch; furnished with
      a sack or pouch, as a petal.
      [1913 Webster]

   2. (Zool.) Of or pertaining to the Saccata, a suborder of
      ctenophores having two pouches into which the long
      tentacles can be retracted.
      [1913 Webster]