Lagrangian

/ləˈɡɹɑ(ː)nd͡ʒi.ən/

//ləˈɡɹɑ(ː)nd͡ʒi.ən// adj

By · According to Wiktionary data (CC BY-SA) ·

"lagrangian" is a 10-letter English headword indexed on PlainSpell.

The verdict

“Lagrangian” is uncommon English (frequency #50,033 among 16,425 “L” headwords), classed as an adjective. The kind of spelling people second-guess.

#50,033
frequency rank, English
16,425
“L” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Of or relating to Joseph Louis Lagrange.

Key facts for Lagrangian
PropertyValue
HeadwordLagrangian
LanguageEnglish
Part of speechAdjective
IPA/ləˈɡɹɑ(ː)nd͡ʒi.ən/
Letters10
Frequency rank#50,033
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “Lagrangian” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). Lagrangian lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

Lagrangian is uncommon English at frequency #50,033 among 16,425 “L” headwords, classed as anadjective, transcribed /ləˈɡɹɑ(ː)nd͡ʒi.ən/. Rarity is why readers land here mid-draft. 3 senses are on record.

No misspelling variants are generated for Lagrangian in our index, typically a sign the spelling maps closely to how the word sounds. We don't track a confusable pairing for this entry, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From Lagrange + -ian. The correct English form is Lagrangian, spelled L-A-G-R-A-N-G-I-A-N.

Definition

  1. 1
    Of or relating to Joseph Louis Lagrange.
  2. 2
    Relating to Lagrangian mechanics.
  3. 3
    Of or relating to a Lagrange point.

Etymology

From Lagrange + -ian.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "Lagrangian"?
"Lagrangian" is spelled L-A-G-R-A-N-G-I-A-N. The IPA pronunciation is /ləˈɡɹɑ(ː)nd͡ʒi.ən/.
What does "Lagrangian" mean?
As an adjective, "Lagrangian" means: Of or relating to Joseph Louis Lagrange.
How do you pronounce "Lagrangian"?
The IPA (International Phonetic Alphabet) transcription for "Lagrangian" is /ləˈɡɹɑ(ː)nd͡ʒi.ən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "Lagrangian"?
From Lagrange + -ian. 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.

Using “Lagrangian”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is L-A-G-R-A-N-G-I-A-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ləˈɡɹɑ(ː)nd͡ʒi.ən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list