inion
noun
inion is spelled I-N-I-O-N: 5 letters. It appears about once in every 76 million words in written English, the 275,970th most frequent word form (wordfreq, 2021 data). As a noun, inion means “A small protuberance on the external surface of the back of the skull near the neck; the external occipital protuberance” (English Wiktionary, September 2026). The plural of inion is inia or inions.
How many letters and syllables are in inion?
| Letters | 5: I-N-I-O-N |
|---|---|
| In writing | about once in every 76 million words; the 275,970th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is inion?
Inion appears about once in every 76 million words in written English, the 275,970th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of inion
- inia plural
- inions plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does inion mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A small protuberance on the external surface of the back of the skull near the neck; the external occipital protuberance.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Inion in Spanish, French, German and Portuguese
In the sense small protuberance on the skull:
| Language | Words |
|---|---|
| French | inion |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does inion come from?
From Ancient Greek ἰνίον (iníon, “occipital bone; back of the head”). Compare -ion (“anthropometric landmark”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).