Sanguivorous

from The Collaborative International Dictionary of English v.0.48

Sanguivorous \San*guiv"o*rous\, a. [L. sanguis blood + vorare to
   devour.] (Zool.)
   Subsisting upon blood; -- said of certain blood-sucking bats
   and other animals. See {Vampire}.
   [1913 Webster] Sanhedrin