craniopagus
cra ni op a gus |ˌkrānēˈäpəgəs ˌkreɪniˈɑpəɡəs | ▶noun ( pl. craniopagi ) (of conjoined twins ) the condition of being joined at the head: [ as modifier ] : the first time that surgeons had tried to separate adult craniopagus twins. ORIGIN based on cranio- ‘skull ’ + Greek pagos ‘something that has become solid. ’
craniopagus |kreɪnɪˈɒpəgəs | ▶noun ( pl. craniopagi |-gʌɪ | ) [ usu. as modifier ] a pair of conjoined twins attached at the head. ORIGIN late 19th cent.: from cranio- + Greek ‘that which is fixed ’.