rhombicosidodecahedron

/ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən/

//ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən// noun

Detailed reference entry for the English word "rhombicosidodecahedron", 22-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Wiktionary, and usage frequency ranked against an open word-frequency list covering the top 100,000 English words. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "rhombicosidodecahedron" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "rhombicosidodecahedron" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.

The verdict

“rhombicosidodecahedron” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.

Unranked
below top-frequency English
22
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) — An Archimedean solid with 62 regular faces (20 triangles, 30 squares, and 12 pentagons), 60 vertices and 120 edges.

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Key facts for rhombicosidodecahedron
PropertyValue
Headwordrhombicosidodecahedron
LanguageEnglish
Part of speechNoun
IPA/ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən/
Letters22
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “rhombicosidodecahedron” sits in English frequency

rhombicosidodecahedron falls 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.

Spelling & Dictionary Insight

The English entry for rhombicosidodecahedron is 22 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "An Archimedean solid with 62 regular faces (20 triangles, 30 squares, and 12 pentagons), 60 vertices and 120 edges.".

No misspelling variants are generated for rhombicosidodecahedron in our index, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: Etymology tree New Latin rhombicosidodecaēdronlbor. English rhombicosidodecahedron Learned borrowing from New Latin rhombicosidodecaēdron (coined by the German astronomer and mathematician Johannes Kepler (1571–1630) in his work Harmonices Mundi Libri V (Th… Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is rhombicosidodecahedron, spelled R-H-O-M-B-I-C-O-S-I-D-O-D-E-C-A-H-E-D-R-O-N, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    An Archimedean solid with 62 regular faces (20 triangles, 30 squares, and 12 pentagons), 60 vertices and 120 edges.

Etymology

Etymology tree New Latin rhombicosidodecaēdronlbor. English rhombicosidodecahedron Learned borrowing from New Latin rhombicosidodecaēdron (coined by the German astronomer and mathematician Johannes Kepler (1571–1630) in his work Harmonices Mundi Libri V (The Harmony of the World in Five Books, 1619)), a blend of Latin rhomb(us) + īcos(aedron) + -i- + dodecaēdron. The English word is analysable as a blend of rhomb(ic) + icosidodecahedron, referring to the fact that the 30 square faces lie in the same planes as the 30 rhombic faces of the rhombic triacontahedron, which is dual to the icosidodecahedron.

This word in other languages

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.

Cite this page

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PlainSpell, “rhombicosidodecahedron, English word data” (May 6, 2026). Derived from Wiktionary (kaikki.org, CC BY-SA) and an open word-frequency list. https://plainspell.com/en/word/rhombicosidodecahedron

Frequently Asked Questions

How do you spell "rhombicosidodecahedron"?
"rhombicosidodecahedron" is spelled R-H-O-M-B-I-C-O-S-I-D-O-D-E-C-A-H-E-D-R-O-N. The IPA pronunciation is /ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən/.
What does "rhombicosidodecahedron" mean?
As a noun, "rhombicosidodecahedron" means: An Archimedean solid with 62 regular faces (20 triangles, 30 squares, and 12 pentagons), 60 vertices and 120 edges.
How do you pronounce "rhombicosidodecahedron"?
The IPA (International Phonetic Alphabet) transcription for "rhombicosidodecahedron" is /ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən/. 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 "rhombicosidodecahedron"?
Etymology tree New Latin rhombicosidodecaēdronlbor. English rhombicosidodecahedron Learned borrowing from New Latin rhombicosidodecaēdron (coined by the German astronomer and mathematician Johannes Kepler (1571–1630) in his work Harmonices Mundi L... See the full etymology section above for more details.
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Using “rhombicosidodecahedron”

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

  • The one correct English spelling is R-H-O-M-B-I-C-O-S-I-D-O-D-E-C-A-H-E-D-R-O-N - every other letter order is a misspelling in standard orthography.
  • Say it as /ˌɹɒmbaɪˌkəʊsidəʊˌdɛkəˈhiːdɹən/ (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

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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 FrequencyWords open word-frequency list