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 Phylactolæma. [ 1913 Webster ]
a. [ Gr. "i`ppos horse + &unr_; shoe + -form.] (Bot.) Shaped like a horseshoe. [1913 Webster]