biofilm

American  

[bahy-oh-film] / ˈbaɪ oʊˌfɪlm /

noun

• biofilms
  plural

1. Biology. a film or thin coating on solid surfaces, consisting of microorganisms and the indissoluble, viscous fluid they secrete.

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biofilm Scientific  

/ bī′ō-fĭlm′ /

1. A complex structure adhering to surfaces that are regularly in contact with water, consisting of colonies of bacteria and usually other microorganisms such as yeasts, fungi, and protozoa that secrete a mucilaginous protective coating in which they are encased. Biofilms can form on solid or liquid surfaces as well as on soft tissue in living organisms, and are typically resistant to conventional methods of disinfection. Dental plaque, the slimy coating that fouls pipes and tanks, and algal mats on bodies of water are examples of biofilms. While biofilms are generally pathogenic in the body, causing such diseases as cystic fibrosis and otitis media, they can be used beneficially in treating sewage, industrial waste, and contaminated soil.

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Other Word Forms

Derived Forms

• antibiofilm
  adjective
• biofilm-like
  adjective
• biofilmed
  adjective

Inflected Forms

Nouns

• biofilms
  plural

Example Sentences

See Examples For:

biofilm biofilms

A big challenge is dental plaque, a protective structure known as a biofilm that helps bacteria adhere to teeth and makes them more resistant to removal by saliva, mouth rinses and some antimicrobial agents.

From The Wall Street Journal ● Jul. 26, 2026

The study found that exposure to nanoplastics increased the physical strength of the biofilm and made it more resistant to disinfectants.

From Science Daily ● Jul. 17, 2026

When the biofilm was exposed to nanoplastics, the bacteria responded in several ways:

From Science Daily ● Jul. 17, 2026

This shift helped raise pH levels inside the biofilm.

From Science Daily ● Jan. 9, 2026

These bacteria are more resistant to drugs when they live in a biofilm -- microorganisms that stick together and are embedded in a protective slime.

From Science Daily ● May 1, 2024

The procedures remove plaque below the gumline and disrupt bacterial biofilms that contribute to gum inflammation.

From The Wall Street Journal ● Jul. 26, 2026

These findings suggest that nanoplastics may make it easier for stubborn biofilms to develop on surfaces used in water treatment and delivery, increasing the difficulty of removing them.

From Science Daily ● Jul. 17, 2026

"The latest theory is related to some of the chemistry that goes into ensuring that the wastewater doesn't develop any biofilms," or microorganisms, he said.

From Barron's ● Apr. 9, 2026

Importantly, the team showed that this method works inside biofilms.

From Science Daily ● Feb. 18, 2026

Earlier laboratory studies conducted outside the human body also suggested that arginine can change the overall makeup of dental biofilms.

From Science Daily ● Jan. 9, 2026