cuboid

/ˈkjuːbɔɪd/

//ˈkjuːbɔɪd// adj

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

"cuboid" is a 6-letter English headword indexed on PlainSpell.

The verdict

“cuboid” is uncommon English (frequency #92,503 among 5,599 “C” headwords), classed as an adjective. The kind of spelling people second-guess.

#92,503
frequency rank, English
5,599
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Of the shape of a cube.

Corpus desk

Index EN-cuboid · cuboid · English

cuboid · rank #92,503 · 0 variants · 0 confusables

  • FREQ-RARE #92,503
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH CSW

Nearest frequency peer: CSW (-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 “cuboid”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for cuboid
PropertyValue
Headwordcuboid
LanguageEnglish
Part of speechAdjective
IPA/ˈkjuːbɔɪd/
Letters6
Frequency rank#92,503
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “cuboid” 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).cuboidfalls 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: “CSW” (#92,502), “cuc” (#92,504), “crys” (#92,501). Among 5,599 “C” headwords, “cuboid” is #92,503. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

cuboid is uncommon English at frequency #92,503 among 5,599 “C” headwords, classed as anadjective, transcribed /ˈkjuːbɔɪd/. Rarity is why readers land here mid-draft. Gloss: "Of the shape of a cube.".

No misspelling variants are generated for cuboid in our index, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From cube + -oid. The correct English form is cuboid, spelled C-U-B-O-I-D.

Definition

  1. 1
    Of the shape of a cube.

Etymology

From cube + -oid.

This word in other languages

parallélépipèdique(Français)

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 "cuboid"?
"cuboid" is spelled C-U-B-O-I-D. The IPA pronunciation is /ˈkjuːbɔɪd/.
What does "cuboid" mean?
As an adjective, "cuboid" means: Of the shape of a cube.
How do you pronounce "cuboid"?
The IPA (International Phonetic Alphabet) transcription for "cuboid" is /ˈkjuːbɔɪd/. 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 "cuboid"?
From cube + -oid. 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 "cuboid", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 6 letters (nearest by frequency rank).

curdle#92,506Darwen#92,515cohost#92,477Dickon#92,531

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

Source: FrequencyWords open word-frequency list