Last modified on 31 January 2015, at 09:43



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Formed from Ancient Greek κάστορας (kástoras) + -anthropy (from άνθρωπος (ánthrōpos)).


  • IPA(key): /kæstəˈɹænθɹəpi/


kastoranthropy (uncountable)

  1. (rare) The delusion that one is a beaver; the condition of being a werebeaver.
    • 1997, Thomas Pynchon, Mason & Dixon:
      The next morning he is found down-hill from his House, beside the fishing-Pond, lying among remnants of gnaw’d Shrubs, with fragments of half-eaten water-lillies protruding from his Mouth. ‘Kastoranthropy,’ Professor Voam shaking his head, ‘And haven’t I seen it do things to a man. Tragick.’
    • 2002, Anne Mangen, ‎Rolf Gaasland, Blissful Bewilderment: Studies in the Fiction of Thomas Pynchon (ISBN 8270993522), page 220:
      [] one of the not uncommon cases of kastoranthropy, or, were-beaverality: []