dihydrogen
/ˌdaɪˈhaɪdɹəd͡ʒ(ə)n/
"dihydrogen" is a 10-letter English headword indexed on PlainSpell.
The verdict
“dihydrogen” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 10
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The divalent radical formed from two separate hydrogen atoms or ions.
| Property | Value |
|---|---|
| Headword | dihydrogen |
| Language | English |
| Part of speech | Noun |
| IPA | /ˌdaɪˈhaɪdɹəd͡ʒ(ə)n/ |
| Letters | 10 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “dihydrogen” sits in English frequency
Rare enough to double-check
dihydrogen is uncommon English outside the top frequency list, classed as anoun, transcribed /ˌdaɪˈhaɪdɹəd͡ʒ(ə)n/. Rarity is why readers land here mid-draft. 3 senses are on record.
We couldn't generate a plausible misspelling set for dihydrogen, typically a sign the spelling maps closely to how the word sounds. Our confusable-pair dataset has no match for it, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From di- + hydrogen. The correct English form is dihydrogen, spelled D-I-H-Y-D-R-O-G-E-N.
Definition
- 1The divalent radical formed from two separate hydrogen atoms or ions.
- 2Describing a dihydrogen bond.
- 3The diatomic hydrogen molecule H₂.
Etymology
From di- + hydrogen.
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.
Frequently Asked Questions
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Using “dihydrogen”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is D-I-H-Y-D-R-O-G-E-N - every other letter order is a misspelling in standard orthography.
- Say it as /ˌdaɪˈhaɪdɹəd͡ʒ(ə)n/ (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
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.