vampirism (n.)

spectral being in a human body who maintains semblance of life by leaving the grave at night to suck the warm blood of the living as they sleep, 1732, vampyre, from French vampire (18c.) or German Vampir (1732, like the English word first in an account of Hungarian vampires), from Hungarian vampir, from Old Church Slavonic opiri (source also of Serbian vampir, Bulgarian vapir, Ukrainian uper), said by Slavic linguist Franc Miklošič to be ultimtely from Kazan Tatar ubyr "witch," but Max Vasmer, an expert in this linguistic area, finds that phonetically doubtful.

An Eastern European creature popularized in English by late 19c. gothic novels, however there are scattered English accounts of night-walking, blood-gorged, plague-spreading undead corpses from as far back as 1196. Figurative sense of "person who preys on others" is from 1741. Applied 1774 by French biologist Buffon to a species of South American blood-sucking bat. Related: Vampiric.

MR. D'Anvers tells of a Conversation he had about a certain Prodigy, mention'd in the News Papers of March last, viz. that in the Village of Medreyga in Hungary, certain dead Bodies (call'd there Vampyres) had kill'd several Persons by sucking out all their Blood : That Arnold Paul, an Heyduke, having kill'd four Persons after he was dead, his Body was taken up 40 Days after, which bled at the Nose, Mouth and Ears : That, according to Custom, they drove a Stake thro' his Heart, at which he gave horrid Groan, and lost a great deal of Blood. And that all such as have been tormented or kill'd by Vampyres, become Vampyres when they are dead. [London Journal, May 20, 1732, quoted in Weekly Essays, May 1732]

The spread of the story about this time is perhaps traceable to a pamphlet published in 1732, the title page of which reads: Dissertationem De Hominibus Post Mortem Sanguisugis, Vulgo Sic Dictis Vampyren, Auctoritate Inclyti Philosophorum Ordinis, Publico Eruditorum Examini Die XXX. Aug. An. MDCCXXXII. Submittent M. Io. Christophorus Pohlius, Lignicens. Silesius Et Io. Gottlob Hertelius, Philos. Et Med. Stud. 

word-forming element making nouns implying a practice, system, doctrine, etc., from French -isme or directly from Latin -isma, -ismus (source also of Italian, Spanish -ismo, Dutch, German -ismus), from Greek -ismos, noun ending signifying the practice or teaching of a thing, from the stem of verbs in -izein, a verb-forming element denoting the doing of the noun or adjective to which it is attached. For distinction of use, see -ity. The related Greek suffix -isma(t)- affects some forms.