biohazard
/ˈbaɪoʊˌhæzɚd/noun
biohazard is spelled B-I-O-H-A-Z-A-R-D: 9 letters and 4 syllables. It appears about once in every 2 million words in written English, the 43,187th most frequent word form (wordfreq, 2021 data). As a noun, biohazard means “A biological hazard: a source of risk due to some biological factor such as bacteria or human waste” (English Wiktionary, September 2026). The plural of biohazard is biohazards.
How many letters and syllables are in biohazard?
| Letters | 9: B-I-O-H-A-Z-A-R-D |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | about once in every 2 million words; the 43,187th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is biohazard?
Biohazard appears about once in every 2 million words in written English, the 43,187th 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 biohazard?
- UK /ˈbaɪəʊˌhæzəd/
- US /ˈbaɪoʊˌhæzɚd/
Biohazard has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Hewsos-biohazard.wav, Wikimedia Commons (author and licence on each file's page).
Forms of biohazard
- biohazards plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does biohazard mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
A biological hazard: a source of risk due to some biological factor such as bacteria or human waste.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Biohazard in Spanish, French, German and Portuguese
In the sense biological risk:
| Language | Words |
|---|---|
| French | risque biologique |
| German | biologisches Risiko, Biogefahr, Biogefährdung |
| Portuguese | risco biológico, biorrisco |
| Spanish | riesgo biológico |
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 biohazard come from?
From bio- + hazard.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).