hippocrepian

from The Collaborative International Dictionary of English v.0.48

Hippocrepian \Hip"po*crep"i*an\, n. [See {Hippocrepiform}.]
   (Zool.)
   One of an order of fresh-water Bryozoa, in which the
   tentacles are on a lophophore, shaped like a horseshoe. See
   {Phylactol[ae]ma}.
   [1913 Webster]