The Collaborative International Dictionary of English v.0.48:

Pedata \Pe*da"ta\ (p[-e]*d[=a]"t[.a]), n. pl. [NL. See
   Pedate.] (Zool.)
   An order of holothurians, including those that have
   ambulacral suckers, or feet, and an internal gill.
   [1913 Webster]