metallocene
/mɪˈtæləsiːn/noun
metallocene is a noun meaning “Any of a class of organic compounds containing two cyclopentadienyl anions and a transition metal whose bonding involves overlap of ns and np…” (English Wiktionary, September 2026). It is spelled M-E-T-A-L-L-O-C-E-N-E, and it appears about once in every 38 million words in written English (wordfreq, 2021 data). The plural of metallocene is metallocenes.
What does metallocene mean?
noun
- 1
Any of a class of organic compounds containing two cyclopentadienyl anions and a transition metal whose bonding involves overlap of ns and np orbitals of the metal with molecular orbitals of appropriate symmetry of each cyclopentadienyl ring; the rings are parallel to each other, or sometimes canted.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce metallocene?
- /mɪˈtæləsiːn/
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Tesco250-metallocene.wav, Wikimedia Commons (author and licence on each file's page).
Forms of metallocene
- metallocenes plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is metallocene?
Metallocene appears about once in every 38 million words in written English, the 189,524th 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).
Metallocene in Spanish, French, German and Portuguese
In the sense organic compound:
| Language | Words |
|---|---|
| French | métallocène |
| German | Metallocen |
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 metallocene come from?
From metallo- + c(yclopentadi)ene. First used in ferrocene.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).