photoperiod

C2+ Topic:Time

US /ˌfoʊtoʊˈpɪriəd/ UK /ˌfəʊtəʊˈpɪəriəd/ See IPA manual

noun

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 photosynthesisphoton period

Etymology

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

# 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

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photoperiod

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