The Collaborative International Dictionary of English v.0.48:

hirudinean \hirudinean\ n.
   Any of a number of carnivorous or bloodsucking aquatic or
   terrestrial worms typically having a sucker at each end.

   Syn: leech, bloodsucker.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

hirudinean
    n 1: carnivorous or bloodsucking aquatic or terrestrial worms
         typically having a sucker at each end [syn: leech,
         bloodsucker, hirudinean]