daylength

noun

"daylength" is a 9-letter English headword indexed on PlainSpell.

The verdict

“daylength” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
9
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - period of daylight; photoperiod

Corpus desk

Index EN-daylength · daylength · English

daylength · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 9 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "D" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for daylength
PropertyValue
Headworddaylength
LanguageEnglish
Part of speechNoun
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “daylength” in English

daylengthfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

daylength is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "period of daylight; photoperiod".

daylength doesn't appear in our generated misspelling index, suggesting the orthography follows predictable English patterns. This headword has no recorded confusable partner, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From day + length. The correct English form is daylength, spelled D-A-Y-L-E-N-G-T-H.

Definition

  1. 1
    period of daylight; photoperiod

Etymology

From day + length.

Synonyms

Antonyms

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "daylength"?
"daylength" is spelled D-A-Y-L-E-N-G-T-H.
What does "daylength" mean?
As a noun, "daylength" means: period of daylight; photoperiod
What is the origin of the word "daylength"?
From day + length. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list