noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
fûr'mēəm
/ˈfɜːɹmiəm/
US:Recorded audio is listed in the source snapshot.
General-American:Recorded audio is listed in the source snapshot.
CMU ARPABET:F EH1 R M IY0 AH0 M
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A transuranic chemical element (symbol Fm) with an atomic number of 100.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
a radioactive transuranic metallic element produced by bombarding plutonium with neutrons
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: Fm, atomic number 100
Antonyms: none provided
Broader terms: metallic element, metal
History
Etymology
From Fermi + -ium; named for Enrico Fermi.
Across languages
Translations
69 source translations are retained for this English entry.
