'periodic-flowering' originates from the combination of 'periodic' and 'flowering', where 'periodic' comes from Greek 'periodikos', meaning 'recurring at intervals', and 'flowering' from Old English 'blōwan', meaning 'to bloom'.

'periodic' changed from the Greek word 'periodikos' and 'flowering' from Old English 'blōwan', eventually forming the modern English term 'periodic-flowering'.

Initially, 'periodic' meant 'recurring at intervals' and 'flowering' meant 'to bloom', and together they describe a plant that blooms at regular intervals.