dihedral

/daɪˈhiːdɹəl/

//daɪˈhiːdɹəl// noun

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

"dihedral" is a 8-letter English headword indexed on PlainSpell.

The verdict

“dihedral” is uncommon English (frequency #85,175 among 3,470 “D” headwords), classed as a noun. The kind of spelling people second-guess.

#85,175
frequency rank, English
3,470
“D” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An angle between two plane surfaces

Corpus desk

Index EN-dihedral · dihedral · English

dihedral · rank #85,175 · 0 variants · 0 confusables

  • FREQ-RARE #85,175
  • LEN-LONG 8 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,470
  • PHOTO-FINISH digitalization

Nearest frequency peer: digitalization (-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 “dihedral”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for dihedral
PropertyValue
Headworddihedral
LanguageEnglish
Part of speechNoun
IPA/daɪˈhiːdɹəl/
Letters8
Frequency rank#85,175
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “dihedral” in English

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

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

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “digitalization” (#85,174), “diluent” (#85,176), “diene” (#85,173). Among 3,470 “D” headwords, “dihedral” is #85,175. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

dihedral is uncommon English at frequency #85,175 among 3,470 “D” headwords, classed as anoun, transcribed /daɪˈhiːdɹəl/. Rarity is why readers land here mid-draft. 3 senses are on record.

Zero misspellings are on record for dihedral in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. Our dataset records no confusable match here, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From di- + -hedral. The correct English form is dihedral, spelled D-I-H-E-D-R-A-L.

Definition

  1. 1
    An angle between two plane surfaces
  2. 2
    The upward slope of an aircraft's wing
  3. 3
    The angle between pairs of chemical bonds separated by a third bond

Etymology

From di- + -hedral.

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 "dihedral"?
"dihedral" is spelled D-I-H-E-D-R-A-L. The IPA pronunciation is /daɪˈhiːdɹəl/.
What does "dihedral" mean?
As a noun, "dihedral" means: An angle between two plane surfaces
How do you pronounce "dihedral"?
The IPA (International Phonetic Alphabet) transcription for "dihedral" is /daɪˈhiːdɹəl/. 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 "dihedral"?
From di- + -hedral. 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 "dihedral", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 8 letters (nearest by frequency rank).

declarer#85,159cyclamen#85,146falchion#85,237chenille#85,110

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

Source: FrequencyWords open word-frequency list