'adenohypophysial' originates from Greek, specifically the words 'adeno-' meaning 'gland' and 'hypophysis' meaning 'under growth' or 'pituitary gland'.

'adenohypophysial' changed from the Greek word 'hypophysis' and eventually became the modern English word 'adenohypophysial'.

Initially, it meant 'relating to the gland under the brain', and this meaning has largely remained the same in modern usage.