[医]
血者

bloodsucker
[ noun ]
carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
<noun.animal> 
Bloodsucker \Blood"suck`er\, n.
1. (Zo["o]l.) Any animal that sucks blood; esp., the leech
({Hirudo medicinalis}), and related species.
2. One who sheds blood; a cruel, bloodthirsty man; one guilty
of bloodshed; a murderer. [Obs.] --Shak.
3. A hard and exacting master, landlord, or money lender; an
extortioner.