spirillum
noun
spirillum is spelled S-P-I-R-I-L-L-U-M: 9 letters. It appears about once in every 93 million words in written English, the 309,272nd most frequent word form (wordfreq, 2021 data). As a noun, spirillum means “Any of various aerobic bacteria of the genus Spirillum, having an elongated spiral form and bearing a tuft of flagella” (English Wiktionary, September 2026). The plural of spirillum is spirillums or spirilla.
How many letters and syllables are in spirillum?
| Letters | 9: S-P-I-R-I-L-L-U-M |
|---|---|
| In writing | about once in every 93 million words; the 309,272nd most frequent word form |
| Wrong spellings searched | none measured in search |
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).
How common is spirillum?
Spirillum appears about once in every 93 million words in written English, the 309,272nd 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).
Forms of spirillum
- spirillums plural
- spirilla plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does spirillum mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any of various aerobic bacteria of the genus Spirillum, having an elongated spiral form and bearing a tuft of flagella.
- 2
Any of various other spiral-shaped microorganisms.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does spirillum come from?
From the genus name, from Latin spira (“coil”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).