Biofilm
noun ·Rare ·Advanced level
Definitions
- 1 A thin film of mucus created by and containing a colony of bacteria and other microorganisms. countable, uncountable
"The differences in biofilm penetration patterns of both tested photosensitisers and the light source could have played an important role for the survival of microorganisms after the application of aPDT. In a recent own study, we showed that the deepest layers of the oral biofilm were not affected by the aPDT [4 ]."
Example
More examples"When you turn on the water, particularly if water has remained stagnant in your home’s pipes for longer than normal (for example, a week or more), germs from biofilm can come out of the faucet, showerhead, or other water devices."
Etymology
From bio- + film. First used in the early 1970s in the context of wastewater treatment.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.