felsic
adjective, noun
felsic is an adjective meaning “Enriched in minerals predominantly composed of the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium” (English Wiktionary, September 2026). It is spelled F-E-L-S-I-C, and it appears about once in every 13 million words in written English (wordfreq, 2021 data).
What does felsic mean?
adjective
- 1
Enriched in minerals predominantly composed of the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
noun
- 1
A rock with such properties.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce felsic?
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-felsic.wav, Wikimedia Commons (author and licence on each file's page).
Forms of felsic
- more felsic comparative
- most felsic superlative
- felsics plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is felsic?
Felsic appears about once in every 13 million words in written English, the 106,501st 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 felsic come from?
Blend of feldspar + silica, + -ic.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).