xenologyEnglishOxford Dictionary of Englishxenology /zɪˈnɒlədʒi / ▸ noun (chiefly in science fiction) the scientific study of alien biology, cultures, etc.. – DERIVATIVES xenologist /zɪˈnɒlədʒɪst / noun– ORIGIN 1950s: from Greek xenos ‘stranger, foreigner’, (adjective) ‘strange’.