biennium
bi·enn·i·um/baɪˈɛn.i.əm/noun
biennium is spelled B-I-E-N-N-I-U-M: 8 letters and 4 syllables (bi·enn·i·um). It appears about once in every 18 million words in written English, the 127,184th most frequent word form (wordfreq, 2021 data). As a noun, biennium means “A period of two years, particularly for purposes involving intercalation or fiscal calculations” (English Wiktionary, September 2026). The plural of biennium is bienniums or biennia.
How many letters and syllables are in biennium?
| Letters | 8: B-I-E-N-N-I-U-M |
|---|---|
| Syllables | 4: bi·enn·i·um |
| In writing | about once in every 18 million words; the 127,184th 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 biennium?
Biennium appears about once in every 18 million words in written English, the 127,184th 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 biennium?
- US /baɪˈɛn.i.əm/
- UK /bʌɪˈɛn.ɪ.əm/
Biennium has 4 syllables, split bi·enn·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)-Vealhurl-biennium.wav, Wikimedia Commons (author and licence on each file's page).
What rhymes with biennium?
2 words on PlainSpell end in the same sounds as biennium from its last stressed vowel (/ɛniəm/):
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 biennium
- bienniums plural
- biennia plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does biennium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A period of two years, particularly for purposes involving intercalation or fiscal calculations.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Biennium in Spanish, French, German and Portuguese
In the sense period of two years:
| Language | Words |
|---|---|
| Spanish | bienio |
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 biennium come from?
From Latin biennium, from biennis (“2-year”) + -ium (suffix forming abstract nouns), from bi- (“two”) + annus (“year”), q.v.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).