encystPronunciation: /ɪnˈsɪst, ɛn-/Definition of encyst verb Zoology enclose or become enclosed in a cyst: once the parasite is encysted the fish is heading for death tapeworms are notorious in their ability to encyst in a great variety of hostsDerivatives encystationPronunciation: /-ˈteɪʃ(ə)n/ noun encystment noun encyst in other Oxford dictionaries Definition of encyst in the US English dictionary