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 September 3, 2026) - The divalent radical formed from two separate hydrogen atoms or ions.
Corpus desk
Index EN-dihydrogen · dihydrogen · English
dihydrogen · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 10 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "D" thin
- PHOTO-UNK Peer pending
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.
| 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) |
Long-tail rank of “dihydrogen” in English
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.
Recorded use
Wiktionary exampleThese source excerpts show how dihydrogen appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The Invisible Killer Dihydrogen monoxide is colorless, odorless, tasteless, and kills uncounted thousands of people every year. Most of these deaths are caused by accidental inhalation of DHMO, but the dangers of dihydrogen monoxide do not end there.
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.