CFK
noun
CFK is a noun meaning “Alternative form of CFC, a class of molecules containing chlorine, fluorine and carbon atoms” (English Wiktionary, September 2026). It is spelled C-F-K, and it appears about once in every 50 million words in written English (wordfreq, 2021 data). The plural of CFK is CFKs.
What does CFK mean?
noun
- 1
rareAlternative form of CFC, a class of molecules containing chlorine, fluorine and carbon atoms
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of CFK
- CFKs plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is CFK?
CFK appears about once in every 50 million words in written English, the 220,118th 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).
Where does CFK come from?
Generally inserted in English texts by mostly Dutch speakers who assume the initialism for chloorfluorkoolstofverbinding is also CFK in English. As carbon is spelled with a C and koolstof with a K, the initialisms are also different.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).