photoperiod

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noun

The normal duration of natural daylight experienced by an organism; daylength.

Similar
daydaylength
Opposite
scotoperiod
UncommonScrabble 19
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Meanings

nounphotoperiod (plural photoperiods)

plural photoperiods

  1. biologyThe normal duration of natural daylight experienced by an organism; daylength.

    Synonyms: day, daylength

Synonyms & antonyms

nounThe normal duration of natural daylight experienced by an organism; daylength.

Similar
daydaylength
Opposite
scotoperiod
Also see
daydaylengthdaylightdaytime

Origin

From photo- + period.

Full word history & related roots →

Translations

Italian fotoperiodo
  • fotoperiododuration of daylight
Cite this entry
APA

photoperiod. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/photoperiod

MLA

“photoperiod.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/photoperiod. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “photoperiod,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/photoperiod.

Source: photoperiod on Wiktionary, CC BY-SA 4.0.