rhizobium
noun
rhizobium is a noun meaning “Any of various bacteria, of the genus Rhizobium, that form nodules on the roots of legumes and fix nitrogen” (English Wiktionary, September 2026). It is spelled R-H-I-Z-O-B-I-U-M, and it appears about once in every 26 million words in written English (wordfreq, 2021 data). The plural of rhizobium is rhizobia.
What does rhizobium mean?
noun
- 1
Any of various bacteria, of the genus Rhizobium, that form nodules on the roots of legumes and fix nitrogen.
- 2
Any diazotrophic bacterium that can fix nitrogen and form root nodules in legumes.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of rhizobium
- rhizobia plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is rhizobium?
Rhizobium appears about once in every 26 million words in written English, the 155,937th 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).
Where does rhizobium come from?
From the genus name.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).