radium
rad·i·um/ˈɹeɪ.di.əm/noun
radium is spelled R-A-D-I-U-M: 6 letters and 3 syllables (rad·i·um). It appears about once in every 2 million words in written English, the 36,998th most frequent word form (wordfreq, 2021 data). As a noun, radium means “The chemical element (symbol Ra) with an atomic number of 88. It is a soft, shiny and silvery radioactive alkaline earth metal” (English Wiktionary, September 2026). The plural of radium is radiums.
How many letters and syllables are in radium?
| Letters | 6: R-A-D-I-U-M |
|---|---|
| Syllables | 3: rad·i·um |
| In writing | about once in every 2 million words; the 36,998th most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is radium?
Radium appears about once in every 2 million words in written English, the 36,998th 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).
How do you pronounce radium?
- UK /ˈɹeɪ.dɪ.əm/
- US /ˈɹeɪ.di.əm/
Radium has 3 syllables, split rad·i·um in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Tesco250-radium.wav, LL-Q1860_(eng)-Naomi_Persephone_Amethyst_(NaomiAmethyst)-radium.wav, Wikimedia Commons (author and licence on each file's page).
What rhymes with radium?
One word on PlainSpell end in the same sounds as radium from its last stressed vowel (/eɪdiəm/):
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of radium
- radiums plural, present, singular, he/she/it
- radiuming participle, present
- radiumed participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does radium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The chemical element (symbol Ra) with an atomic number of 88. It is a soft, shiny and silvery radioactive alkaline earth metal.
- 2
An atom of this element.
- 3
datedA type of cloth woven from silk or synthetic yarn, often with a shiny appearance.
verb
- 1
obsoleteTo treat (a tumour, etc.) with radium.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Radium in Spanish, French, German and Portuguese
In the sense chemical element with an atomic number of 88:
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.