biofilm
noun
bio·film
ˌbī-(ˌ)ō-ˈfilm 
: a thin usually resistant layer of microorganisms (such as bacteria) that form on and coat various surfaces
Examples of biofilm in a Sentence
Recent Examples on the Web
Here, sulfur-oxidizing bacteria grow in thick white biofilms on wet rock and sediment.
—
New Atlas, 5 Nov. 2025
Current solutions include using chloramine as a disinfectant, periodic backwashing to prevent biofilms from forming on the membrane, and air scouring.
—Tejasri Gururaj, Interesting Engineering, 24 Oct. 2025
Scientists from São Paulo State University's Araraquara School of Dentistry in Brazil tested morin — a naturally occurring compound extracted from the peels and leaves of certain fruits and vegetables — on bacterial biofilms that mimicked gum disease.
—Deirdre Bardolf, FOXNews.com, 22 Oct. 2025
In the thermal spring Roadside West (left) in Yellowstone National Park, researchers isolated an unusual microbe from the gray-colored biofilm (right).
—Jake Buehler, Wired News, 31 Aug. 2025
See All Example Sentences for biofilm
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New Atlas, 5 Nov. 2025
Current solutions include using chloramine as a disinfectant, periodic backwashing to prevent biofilms from forming on the membrane, and air scouring.
—Tejasri Gururaj, Interesting Engineering, 24 Oct. 2025
Scientists from São Paulo State University's Araraquara School of Dentistry in Brazil tested morin — a naturally occurring compound extracted from the peels and leaves of certain fruits and vegetables — on bacterial biofilms that mimicked gum disease.
—Deirdre Bardolf, FOXNews.com, 22 Oct. 2025
In the thermal spring Roadside West (left) in Yellowstone National Park, researchers isolated an unusual microbe from the gray-colored biofilm (right).
—Jake Buehler, Wired News, 31 Aug. 2025
See All Example Sentences for biofilm
Cite this Entry
“Biofilm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biofilm. Accessed 11 Nov. 2025.
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biofilm
noun
bio·film
ˈbī-ō-ˌfilm
: a thin usually resistant layer of microorganisms (as bacteria) that form on and coat various surfaces (as of catheters or water pipes)
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