biofilm
noun
bio·film
ˌbi-(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
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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
Scientists submerged individual bags of different microplastics and natural surfaces into the water and performed various tests on the resulting biofilms—running analyses on biofilm formation, metabolic activity, antibiotic resistance genes and resistance against three antibiotics.
—Marta Zaraska, Scientific American, 26 Aug. 2025
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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
Scientists submerged individual bags of different microplastics and natural surfaces into the water and performed various tests on the resulting biofilms—running analyses on biofilm formation, metabolic activity, antibiotic resistance genes and resistance against three antibiotics.
—Marta Zaraska, Scientific American, 26 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 29 Oct. 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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