biplane

/ˈbaɪpleɪn/

//ˈbaɪpleɪn// adj

"biplane" is a 7-letter English headword indexed on PlainSpell.

The verdict

“biplane” is uncommon English (frequency #55,284 among 4,121 “B” headwords), classed as an adjective. The kind of spelling people second-guess.

#55,284
frequency rank, English
4,121
“B” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Composed of, or relating to, two planes (flat surfaces extending infinitely in all directions).

Corpus desk

Index EN-biplane · biplane · English

biplane · rank #55,284 · 0 variants · 0 confusables

  • FREQ-RARE #55,284
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 4,121
  • PHOTO-FINISH Blaney

Nearest frequency peer: Blaney (+1 rank slots)

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.

Long-tail ranks near “biplane”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “biplane” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for biplane
PropertyValue
Headwordbiplane
LanguageEnglish
Part of speechAdjective
IPA/ˈbaɪpleɪn/
Letters7
Frequency rank#55,284
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “biplane” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).biplanefalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “Blaney” (#55,285), “biophysical” (#55,282), “bloodstained” (#55,286). Among 4,121 “B” headwords, “biplane” is #55,284. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

biplane is uncommon English at frequency #55,284 among 4,121 “B” headwords, classed as anadjective, transcribed /ˈbaɪpleɪn/. Rarity is why readers land here mid-draft. 2 senses are on record.

No generated misspelling entries exist for biplane in our index, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: From bi- + plane. The correct English form is biplane, spelled B-I-P-L-A-N-E.

Definition

  1. 1
    Composed of, or relating to, two planes (flat surfaces extending infinitely in all directions).
  2. 2
    Having, or consisting of, two superposed planes, aerocurves, etc.

Recorded use

Wiktionary examples

These source excerpts show how biplane appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. biplane angiography
  2. The left apical 4-chamber image is used for one measurement and for a “biplane” estimate (that averages values from orthogonal planes), either the right parasternal long-axis image (the authors' preference) or the left apical 2-chamber view (shown here) is also measured. […] Either a biplane (Simpson) method of discs or a 3D volumetric rendering is used f…

Etymology

From bi- + plane.

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 "biplane"?
"biplane" is spelled B-I-P-L-A-N-E. The IPA pronunciation is /ˈbaɪpleɪn/.
What does "biplane" mean?
As an adjective, "biplane" means: Composed of, or relating to, two planes (flat surfaces extending infinitely in all directions).
How do you pronounce "biplane"?
The IPA (International Phonetic Alphabet) transcription for "biplane" is /ˈbaɪpleɪn/. 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 "biplane"?
From bi- + plane. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "biplane", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 7 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list