counterion
noun
counterion is spelled C-O-U-N-T-E-R-I-O-N: 10 letters. It appears about once in every 68 million words in written English, the 258,950th most frequent word form (wordfreq, 2021 data). As a noun, counterion means “Any ion of opposite charge to another in a solution or other electrochemical system” (English Wiktionary, September 2026). The plural of counterion is counterions.
How many letters and syllables are in counterion?
| Letters | 10: C-O-U-N-T-E-R-I-O-N |
|---|---|
| In writing | about once in every 68 million words; the 258,950th 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 counterion?
Counterion appears about once in every 68 million words in written English, the 258,950th 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 counterion
- counterions plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does counterion mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any ion of opposite charge to another in a solution or other electrochemical system
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Counterion in Spanish, French, German and Portuguese
In the sense ion of opposite charge:
| Language | Words |
|---|---|
| French | contre-ion |
| German | Gegenion |
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 counterion come from?
From counter- + ion.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).