Lycanthropy

In folklore, lycanthropy is the ability or power of a human being to undergo transformation into a wolf. The term comes from Greek lykánthropos (λυκάνθρωπος): λύκος, lýkos ("wolf") + άνθρωπος, ánthrōpos ("man") (Rose, 230). The word can also be used transitively, referring to the act of transforming someone else into a wolf, or werewolf.