'regularly-sectioned' originates from the combination of 'regularly' and 'sectioned', where 'regularly' means 'in a consistent manner' and 'sectioned' means 'divided into parts'.

'Regularly' comes from the Latin word 'regularis', and 'sectioned' comes from the Latin word 'sectio', meaning 'a cutting'.

Initially, it meant 'divided into parts in a consistent manner', and this meaning has largely remained the same in modern usage.