photoperiod C2+ Topic:Time US /ˌfoʊtoʊˈpɪriəd/ UK /ˌfəʊtəʊˈpɪəriəd/ See IPA manual Meanings 1 noun the duration of daily light exposure affecting an organism A longer photoperiod triggered the plants to flower. Thesaurus Synonyms 1 noun · the duration of daily light... daylength Word family Derived forms photoperiodicphotoperiodism Related forms photosynthesisphotonperiod Etymology AI details A 20th-century scientific compound of Greek-derived photo- (from phos, 'light') and period (from Greek periodos, 'a going around, cycle'). phos Ancient Greek periodos Ancient Greek View etymology graph -> Topics Time External links Cambridge Dictionary Wiktionary Google Images # photoperiod **Type:** Word **Level:** C2+ **Part of speech:** noun **IPA (US):** /ˌfoʊtoʊˈpɪriəd/ **IPA (UK):** /ˌfəʊtəʊˈpɪəriəd/ ## Meanings 1. the duration of daily light exposure affecting an organism ## Examples - A longer photoperiod triggered the plants to flower. ## Synonyms - daylength ## Derived Forms - photoperiodic - photoperiodism ## Related Forms - photosynthesis - photon - period ## Roots and Affixes - Root: phos - Root: periodos ## Etymology A 20th-century scientific compound of Greek-derived photo- (from phos, 'light') and period (from Greek periodos, 'a going around, cycle'). ## AI Etymology Photoperiod is a 20th-century scientific compound of Greek-derived photo- (from phos, 'light') and period (from Greek periodos, 'a going around, cycle'). The etymological trail includes Ancient Greek phos and Ancient Greek periodos. As a noun, photoperiod means the duration of daily light exposure affecting an organism. The same family is visible in derived forms such as photoperiodic and photoperiodism and related forms such as photosynthesis, photon, and period. ## Topics - Time markdown