fibrillating
adjective, verb
fibrillating is an adjective meaning “Splitting into fibrils or fibres” (English Wiktionary, September 2026). It is spelled F-I-B-R-I-L-L-A-T-I-N-G, and it appears about once in every 78 million words in written English (wordfreq, 2021 data).
What does fibrillating mean?
adjective
- 1
Splitting into fibrils or fibres.
- 2
Of a muscle, especially in the heart: undergoing fibrillation; quivering.
verb
- 1
present participle and gerund of fibrillate
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of fibrillating
- more fibrillating comparative
- most fibrillating superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is fibrillating?
Fibrillating appears about once in every 78 million words in written English, the 279,513th 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 fibrillating come from?
From fibrillate + -ing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).