vampirism

(vampīr iz′əm, -pə riz′əm)

noun

  1. superstitious belief in vampires
  2. the practices of vampires in folklore, specif. bloodsucking
  3. the act or practice of preying ruthlessly on other people

See vampirism in American Heritage Dictionary 4

noun
  1. Belief in vampires.
  2. The behavior of a vampire.
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