'angelological' originates from English, specifically from the word 'angelology' combined with the suffix '-ical', where 'angelology' meant 'the study of angels' and '-ical' forms adjectives meaning 'pertaining to'.

'angelology' comes from Medieval Latin 'angelologia', and the adjective form 'angelological' was created in English by adding '-ical'.

Initially, it meant 'pertaining to the study of angels', and this meaning has remained unchanged in modern usage.