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

Recent Examples on the Web

Boric acid suppositories may also help prevent biofilms, which is especially helpful for those with chronic BV.2 However, boric acid has not been proven effective in treating isolated or initial cases of BV and should not be used as a primary treatment.4 3. —Laura Young, Verywell Health, 3 Apr. 2025

Once attached, the bacteria created a biofilm: a sticky material that protects microbes from invaders and keeps them fixed to the surface, Gross explained. —Sharon Udasin, The Hill, 11 Mar. 2025

Some form dense plaques together, known as biofilms. —Veronique Greenwood, WIRED, 9 Feb. 2025

While many surfaces can host biofilms — the plaque on your teeth is a biofilm — plastics appear to provide an especially strong bond that attracts the most prolific bacteria, according to the study. —Sandee Lamotte, CNN, 11 Mar. 2025

Word History

First Known Use

1975, in the meaning defined above

Rhymes for biofilm

• film
• microfilm

Medical Definition

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)