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Word of the Day Wednesday, June 10, 2026

commensals

/kəˈmɛnsəlz/ noun · British & US
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What does commensals mean?

noun

Organisms that live in close association with another organism, often benefiting from the relationship, such as bacteria in the human gut. Commensals are often distinguished from parasites, which harm their host, and mutualists, which benefit both organisms.

Example

"The bacteria in the human gut are commensals, providing essential nutrients while not causing harm."

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Etymologically related

Synonyms for commensals

Antonyms of commensals

Rhymes with commensals